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).一後推式割草機(10)包含一切割刀(14)及覆蓋該切割刀(14)以允許該切割刀(14)旋轉來切割草之一外殼(11)。該外殼(11)包含覆蓋該切割刀(14)之一前部之一前壁部分(31)及除該前壁部分(31)以外的一部分(11g)。該前壁部分(31)在該外殼(11)上側向延伸。該前壁部分(31)具有超過除該前壁部分(31)以外的該部分(11g)之一厚度(T2)兩倍的一厚度(T1)。該前壁部分(31)具有一向下凸起底部表面(31b),且充當一手柄以供在提起該割草機(11)中使用。11a...前部11g...部分11h...彎曲外表面11i...內表面31...前壁部分31a...外表面31b...底部表面32...內壁32a...底部表面33...外壁33a...底部表面34...肋34a...底部表面36...空間41...加強肋