The invention provides a stepping-type mower capable of being realized with a simple structure, which can not only realize mowing process advancing a moving body and a mowing process retreating the moving body, but also can save power enabling rotation of mowing knives. The stepping-type mower includes an inclined gesture variation mechanism as below, which enables the mowing knives (10) to rotate freely about an upper/lower axes (P2) and to support on the moving body (1) about a left/right axes (P1) in a swinging manner, besides, when the moving body (1) advances, the gesture is varied to a front-falling inclined gesture that the front side of the mowing knives (10) swings downwards, when the moving body (1) retreats, the gesture is varied to a back-falling inclined gesture that the backside of the mowing knives (10) swings downwards.