A lawn mower includes a cutter blade that cuts grass； a body portion including a housing containing the cutter blade, and a grass clippings discharge passage that discharge grass clippings cut by the cutter blade from the housing； a grass clippings container detachably attached to the body portion, and a slide device. The grass clippings discharge passage includes an upstream opening connected to the housing, and a downstream opening for ejecting grass clippings to outside of the body portion. The grass clippings container includes an opening opened toward the body portion and connected to the body portion, an end surface facing the opening, and a side surface extending from the opening to the end surface. The slide device adjusts a distance between the downstream opening of the grass clippings discharge passage and the end surface of the grass clipping container.
