The utility model relates to an electric mower. A rechargeable battery (26) and an electric motor (22) which is driven by the battery are installed in the machine body part (11), a cutter blade (23) is arranged in a cutter casing (21) and is driven by the electric motor to rotate, and thus mowing can be realized. A covering component (27) is used for covering the battery and the electric motor. The covering component is gradually inclined in the direction from the front part to the rear part of the machine body part, the front part of the lower part of the covering component is provided with an opening (47a), the rear end part of the covering component is provided with a vent (27a), and thus air circulation from the opening to the vent can be realized, and the battery and the electric motor can be cooled by airflow.