An electric oscillating tool (100) which actuates a tool (200) around a spindle (120) is provided. The electric oscillating tool (10) comprises a motor (110), the spindle (120) which is driven by the motor (110), and a driving transmission member which transmits a rotational output of the motor (110) to the spindle (120). The driving transmission member includes an eccentric moving member, a driven arm (114), a spindle connecting arm (115), and a pin (116) which connects the driven arm (114) and the spindle connecting arm (115) in a relatively rotatable manner. The eccentric moving member comprises an eccentric shaft (112) which moves eccentrically around a rotational shaft of the motor (110), a first bearing (113a), and a second bearing (113b).