Abstract: A molded plastic grass catcher for a lawn mower or the like. The catcher is formed from a two piece construction so that it may be shipped in a compact, knocked-down condition but easily assembled by the ultimate user. The housing is configured with a pair of air outlets that are disposed out of the path of discharge from the mower discharge chute so as to permit the free exit of air while at the same time precluding the discharge of grass. In some embodiments of the invention, a baffle is also positioned between the inlet and outlet so as to further add in the grass separation without restricting the air flow.