Being the capital, Bangkok probably has a more vibrant art scene than the rest of the country.
There are now literally scores of private galleries in Bangkok ranging from small informal affairs to galleries with plush modern architecture. Many galleries of course focus on Thai traditional art and the main gallery for this genre is the National Gallery. Outside the galleries though, art hits the streets - wander down places like Khao San Road or the main student areas and you are bound to meet an artist selling his/her paintings. For genuine art lovers Bangkok is a bit of an unknown quantity, yet it is a pleasant surprise when you get here. Although you might have to look a bit harder for it, it is all here ... and it all has a uniquely Thai flavour!
People here on a longer trip you can explore more of the capital's galleries.