In an awning for a cruiser, the awning including a roof frame longitudinally curved and arranged to be inclined down ahead above an open cabin; a roof cover provided to be put on the roof frame; a transparent window panel that is provided to be inclined to be continuous to the inclination of the roof frame and moves in a space between a front end of the roof frame and a front portion of the open cabin present in front of the roof frame so as to be able to slidably open and close the space; a slide rail arranged below a side frame arranged on each of left and right edges of the roof frame, a distance between the slide rail and the side frame being always constant; and a slider fixed to each of left and right sides of the window panel and slidably attached onto the slide rail, a transfer reciprocating between the front end of the roof frame and a rear portion of the roof frame along a curved shape of the roof frame is provided on the roof frame, and the window panel is connected to the transfer.