An electric work machine including an electric motor that operates a work tool, the electric work machine comprising: a rectification circuit converting a voltage to be applied to the electric motor from an alternating current voltage to a direct current voltage; a switching circuit controlling the electric motor, a casing that accommodates the rectification circuit and the switching circuit; a suction port (14a, 133a) provided in the casing and through which the air outside the casing is introduced into the casing; an exhaust port provided in the casing and through which the air inside the casing is exhausted outside the casing; characterised by a first circulation path which is formed in the casing to connect the suction port (14a, 133a) and the exhaust port and through which the air for cooling the rectification circuit and the switching circuit flows; and a control substrate arranged in the casing, wherein the rectification circuit and the switching circuit are attached to the control substrate, the rectification circuit is arranged upstream of the switching circuit in a circulation direction of air in the first circulation path, the rectification circuit is arranged between the suction port (14a, 133a) and the switching circuit in the circulation direction of air in the first circulation path, a first heat sink that transmits heat of the rectification circuit to the air and a second heat sink (78, 81, 144) that transmits heat of the switching circuit to the air are further provided, the switching circuit includes a plurality of switching elements (Tr1 to Tr6), the plurality of switching elements (Tr1 to Tr6) are arranged in the circulation direction of the air in the first circulation path, and the second heat sink (78, 81, 144) is attached to the plurality of switching elements (Tr1 to Tr6). a rectification circuit converting a voltage to be applied to the electric motor from an alternating current voltage to a direct current voltage; a switching circuit controlling the electric motor, a casing that accommodates the rectification circuit and the switching circuit; a suction port (14a, 133a) provided in the casing and through which the air outside the casing is introduced into the casing; an exhaust port provided in the casing and through which the air inside the casing is exhausted outside the casing; characterised by a first circulation path which is formed in the casing to connect the suction port (14a, 133a) and the exhaust port and through which the air for cooling the rectification circuit and the switching circuit flows; and a control substrate arranged in the casing, wherein the rectification circuit and the switching circuit are attached to the control substrate, the rectification circuit is arranged upstream of the switching circuit in a circulation direction of air in the first circulation path, the rectification circuit is arranged between the suction port (14a, 133a) and the switching circuit in the circulation direction of air in the first circulation path, a first heat sink that transmits heat of the rectification circuit to the air and a second heat sink (78, 81, 144) that transmits heat of the switching circuit to the air are further provided, the switching circuit includes a plurality of switching elements (Tr1 to Tr6), the plurality of switching elements (Tr1 to Tr6) are arranged in the circulation direction of the air in the first circulation path, and the second heat sink (78, 81, 144) is attached to the plurality of switching elements (Tr1 to Tr6).