<;P>;PROBLEM TO BE SOLVED: To provide a self-propelled riding-type electric mower enabling long-time work, with its center of gravity set lower. <;P>;SOLUTION: The self-propelled riding-type electric mower 10 includes: a steering seat; a motor 16 for traveling; a mower blade; and a mower blade motor 15 to drive the mower blade; and makes mowing operations by rotating the mower blade. The electric mower 10 also includes a plurality of batteries 25 to supply electric power to the motor 16 and the motor 15, wherein the plurality of batteries 25 are placed flat on the rear of a chassis 11. <;P>;COPYRIGHT: (C)2011,JPO&INPIT