To provide a self-propelled mowing machine that can prevent an abnormal load and abnormal heat generation of a traveling motor and a cutting blade motor, and thereby can efficiently perform the mowing work continuously for a long time.SOLUTION: A self-propelled mowing machine 1 includes: a body unit 2； a traveling unit 3 provided at the traveling direction right-left sides of the body unit 2, and having a traveling motor 31 for drive traveling； and a working unit 4 positioned in front of the body unit 2 and the traveling unit 3, and for working. The working unit 4 includes: multiple cutting blades 53 for cutting grass； a cutting blade housing 43 for covering a portion of upper parts and side faces of the cutting blades 53； and a cutting blade motor 51 positioned at the bottom side of the cutting blade housing 43, and for rotationally driving the cutting blades 53.SELECTED DRAWING: Figure 2【課題】走行モータ及び刈刃モータの異常負荷や異常発熱を防止し、長時間連続して効率的に草刈作業が行える自走式草刈機を提供する。【解決手段】自走式草刈機１は、本体部２と、本体部２の進行方向左右側に設けられ、駆動走行をさせる走行モータ３１を有した走行部３と、本体部２及び走行部３の前方に位置し、作業をするための作業部４と、を備え、作業部４は、草を刈るための複数の刈刃５３と、刈刃５３の上方及び側面の一部を覆う刈刃ハウジング４３と、刈刃ハウジング４３の下面側に位置し刈刃５３を回転駆動するための刈刃モータ５１と、を備えた。【選択図】図２
