An electronic device and a hinge assembly are provided. The electronic device includes a main body, a display unit rotatably coupled with the main body, a hinge assembly including a motor assembly disposed on at least a portion of an end thereof and rotatably coupling the display unit to the main body, wherein the hinge assembly further includes a first shaft configured to provide a rotation axis to the display unit, a first connecting member including a first coupling piece coupled to the display unit and a first arm extending from the first coupling piece and sharing the rotation axis with the first shaft, and a second connecting member including a second coupling piece coupled to the main body and a second arm extending from the second coupling piece and sharing the rotation axis with the first shaft, and an adapter connecting the motor assembly with the first shaft.