Mah Boon Khrong
Also known as MBK, this massive shopping complex consists of the Tokyu department store and more than 1,000 specialised shops -- most of them owner operated -- with stuff ranging from mobile phones, electronic gadgetry, local designer clothing, endless quality knockoffs, old and new camera gear (the best place in the city to get your cameras repaired or to pick up rare equipment) and countless other consumer delights. The complex also houses movie theatres, a bowling alley, and as with most of Bangkok loads of places to eat. At the smaller stalls, be prepared to bargain.
Siam Square 
This is Bangkok's pre-mall shopping haven and nearly forty years on, remains popular, especially among young and trendy Thai teens. It is outdoors, a sort of shopping village, consisting of about a dozen narrow streets (some of them pedestrianised) and lined with small shops and restaurants. Many of these are name-brand boutiques (usually with better prices than you would pay at home) and independent clothing and curio designers. This is probably the trendiest spot in town to shop if you want to pick up cutting-edge stuff from America, Europe and Japan.
It is a popular hangout for Thai teens. In any case, it is a great place for a bit of people watching. The place also has loads of ice creams parlours, fast food, Thai treats, a Hard Rock Cafe and three old-style movie theatres -- much more pleasant and grand than modern ciniplexes. A good way to satisfy your consumer desires and take in a little modern-day Thai culture.
Siam Center and Siam Discovery Across the road from Siam Square, and in some ways an extension of it, this air-conditioned mall

has scores of shops in the upper end fashion, including clothes and other trendy youth pursuits like rollerblading and other sporting shops. Alongside this are electronics shops, (genuine) watches, sunglasses, furniture, music shops, and most other things you'd expect to find -- most of it top drawer stuff. Be sure to cross the pedestrian bridge to the attached Siam Discovery Center, a six floor building with a different shopping theme on each floor plus plenty of western and Thai restaurants.
Siam Paragon 
Occupying more than 20 acres of land, Siam Paragon is one of the biggest and most elegant shopping centers in Asia. Dubbed as "the Pride of Bangkok", it is the largest upscale shopping mall in Thailand. Historically, the shopping mall is located on the former site of the Siam Intercontinental Hotel whose lease ended in 2002. Open in late 2005, it features a vast range of retail stores, restaurants, movie theaters, luxury car showrooms, an opera house, a supermarket and an aquarium.
Bangkok's Open Markets:
Khaosan Road, Banglamphu
Backpacker central has a lot of market-style stalls selling all sorts from beaded necklaces to wooden elephants, to weapons that would frighten a Ninja. In spite of this being the budget traveller's haven, the prices are not necessarily the cheapest in town. Trok Mayom, a small alleyway running parallel to Khaosan is a great place for custom leather crafts for a personalised wallet embossed with your name, or saddlebags for your Harley back home, or anything else your fertile imagination can dream up.
Chatuchak Weekend Market
This massive market, at the end of the northern Skytrain line of Morchit Station, has everything you ever imagined. The creativity of the whole country is distilled here. Leatherwork, lamps, curios, sculptures, furniture, Japanese action figurines - name it and you'll find it here. Such is its fame that you have to bargain hard to get a good price.
Chatuchak is only open on Saturday and Sunday (many of the vendors have regular jobs during the week), it can get pretty hot and crowded here, so pace yourself and don't expect to cover the whole place. To make the most of it, pick up a copy of the Nancy Chandler Shopping Map to Bangkok, which lists off all the sections of the market and what you can expect to find there.
Suan Lum Night Bazaar
This market is similar to Chatuchak (see above), but with less variety as it is still quite new. Nonetheless, it has a wide range of stuff, is conveniently located near the Sala Daeng Skytrain Station, and has a more open and comfortable design, plus a big beer and food garden with entertainment. Opens in the late afternoon, and closes at about 11 pm.
Patpong Tucked in on the main road of the city's most famous red-light district, this market has mostly handicrafts and knockoffs in the way of t-shirts, watches, binoculars (not that you need them on this road), luggage, DVDs and more. A novel place to shop and very popular with tourists, but the vendors pitch their prices very high here, so bargain hard -- though the vendors are pretty hard to bend here. If you can't get what you want, clear the way for some other mug -- there are plenty behind you.
Sukhumvit Road
Along the main hotel strip of Sukhumvit Road from soi 11 to soi 21 are countless street stalls (more sparse in the daytime). On sale here are similar items to Patpong (see above), and the prices tend to be a bit more reasonable. A good place to get T-shirts with funny slogans on them.
ChinatownAround the intersections of Siphon Han and Phahurat roads in Chinatown you'll find a bizarre range of shopping opportunities. It's a joy to poke around in the daytime and see what you can find. Guns, musical equipment, bicycle shops, and just about anything else that can be sold appear in groups of three to ten shops carrying the same items, ensuring you can get the best price going. Nearby are of course loads of Chinese restaurants (most with excellent and cheap seafood). A great way to spend an idle day of discovery.
Post : http://www.thailandgrandfestival.com