A walk-behind lawn mower (10) includes a cutter (14) and a housing (11) covering the cutter (14) for allowing rotation of the cutter (14) to cut grass. The housing (11) includes a front wall portion (31) covering a front part of the cutter (14) and a portion (11g) other than the front wall portion (31). The front wall portion (31) extends laterally of the housing (11). The front wall portion (31) has a thickness (T1) more than twice a thickness (T2) of the portion (11g) other than the front wall portion (31). The front wall portion (31) has a downwardly convex bottom surface (31b), and serves as a handle for use in lifting up the lawn mower (11).
