Electric-power-driven working device

An electric-power-driven working device comprising:

• a body case;
• a saw chain projecting frontward out of a front portion of the body case;
• a motor driving the saw chain;
• and
• a battery for supplying electric power to the motor,
• wherein the front portion of the body case houses the motor while a battery mount-and-release portion, into which the battery is mounted and from which the battery is released, is formed at a rear portion of the body case,
• wherein the battery mount-and-release portion includes a retaining portion to retain the battery and a battery case in which the battery is housed, the battery case including right and left side walls extending to protrude rearward respectively from right side and left side lower portions of the retaining portion and a rear end wall extending between rear end portions of the right and left side wall, and the battery mounted in the battery mount-and-release portion extends in an upper-lower direction and across a middle portion in a height direction of the rear portion of the body case, and
• wherein a side handle is arranged to a side face of the body case, extends from the front portion of the body case to the rear portion of the body case and includes a rear end portion that is disposed rearward of and below an output shaft of the motor and attached to a side of the battery case.