An electric riding mower efficiently cooling a motor driver with a simple configuration is provided. Provided are two running motors 16 independently driving paired rear tires 13； a mower blade mowing grass by being rotated； a mowing motor 15 rotating the mower blade； a battery 25 supplying electric power to the running motors 16 and the mowing motor 15； and a mower-motor driver MD controlling the rotational speed of the mowing motor 15, wherein the mower-motor driver MD is disposed in a driver storage part on a front part of the mower, and a slit 33SL taking in external air is disposed on a front surface of the driver storage part.
