A fluid pressure drive device , comprising: a fluid pressure motor configured to be driven by a working fluid which is supplied from a fluid pressure pump ; a pair of main passages connected to the fluid pressure motor , one of the main passages to which the working fluid supplied from the fluid pressure pump is led; and a flushing circuit configured to discharge the working fluid from one of the pair of main passages to a tank , wherein the flushing circuit has: a low pressure selection valve provided between the pair of main passages and configured to be switched by a pressure difference between the pair of main passages , the low pressure selection valve being configured to select the main passage on the low pressure side; and a flushing passage configured to lead the working fluid passing through the low pressure selection valve to the tank , and the flushing passage has a first orifice and a bent portion formed on the downstream side of the first orifice characterized in that the flushing passage further has a first flushing hole formed in a linear shape and a second flushing hole formed in a linear shape communicating with each other, the first orifice is provided in the first flushing hole , the bent portion is a communication portion between the first flushing hole and the second flushing hole . a fluid pressure motor configured to be driven by a working fluid which is supplied from a fluid pressure pump ; a pair of main passages connected to the fluid pressure motor , one of the main passages to which the working fluid supplied from the fluid pressure pump is led; and a flushing circuit configured to discharge the working fluid from one of the pair of main passages to a tank , wherein the flushing circuit has: a low pressure selection valve provided between the pair of main passages and configured to be switched by a pressure difference between the pair of main passages , the low pressure selection valve being configured to select the main passage on the low pressure side; and a flushing passage configured to lead the working fluid passing through the low pressure selection valve to the tank , and the flushing passage has a first orifice and a bent portion formed on the downstream side of the first orifice characterized in that the flushing passage further has a first flushing hole formed in a linear shape and a second flushing hole formed in a linear shape communicating with each other, the first orifice is provided in the first flushing hole , the bent portion is a communication portion between the first flushing hole and the second flushing hole . a low pressure selection valve provided between the pair of main passages and configured to be switched by a pressure difference between the pair of main passages , the low pressure selection valve being configured to select the main passage on the low pressure side; and a flushing passage configured to lead the working fluid passing through the low pressure selection valve to the tank , and the flushing passage has a first orifice and a bent portion formed on the downstream side of the first orifice characterized in that the flushing passage further has a first flushing hole formed in a linear shape and a second flushing hole formed in a linear shape communicating with each other, the first orifice is provided in the first flushing hole , the bent portion is a communication portion between the first flushing hole and the second flushing hole . the first orifice is provided in the first flushing hole , the bent portion is a communication portion between the first flushing hole and the second flushing hole . <EOS>