A drive device for a hybrid vehicle includes an input shaft, a motor having a rotor and a stator, an output shaft integrally and coaxially connected to the rotor along a rotation axis and configured so as to be engaged with and disengaged from the input shaft, a rotation angle sensor including a rotating portion and a fixed portion, which forms an angle relative to the rotating portion, and detecting a rotation angle of the rotor, and a case rotatably and axially supporting the input shaft and the output shaft on the rotation axis and accommodating the motor and the rotation angle sensor, wherein a side wall portion of the case includes an angle adjusting member coaxially supporting the fixed portion relative to the rotation axis while allowing the angle of the fixed portion to be adjustable, and a clamp member supporting a harness movably connected to the fixed portion.