泰竹（学名：Thyrsostachys siamensis），又名暹罗竹，为禾本科泰竹属下的一个种。秆匀称，通直，常形成密集而较小的竹丛。梢头劲直，高7－15米，粗3－5厘米。

The Thai Bamboo, (Thyrsostachys siamensis), is one of two bamboo species belonging to the Thyrsostachys genus. It grows up to 7 to 13m tall. It is native to Yunnan, Myanmar, Laos, Thailand, Vietnam and naturalised in Sri Lanka, Bangladesh, Malaysia. The plant is also known as Monastery bamboo, Umbrella bamboo, Thai umbrella bamboo, and Umbrella-handle bamboo.