Backrest assembly for standing ride

A structure of a backrest assembly for a standing ride type driver's platform in an industrial vehicle which an operator drives and controls while standing, includes a backrest pad and a backrest height adjustment mechanism. The backrest pad is installed in the driver's platform, and includes a backrest portion for supporting the operator's back and a seat portion that protrudes forward from the backrest portion for supporting the operator's buttocks. The backrest pad is installed in the driver's platform through a backrest height adjustment mechanism.