IN-WHEEL MOTOR DRIVE DEVICE

Provided is an in-wheel motor drive device () including: a motor (); a wheel bearing (); and a speed reducer (). The speed reducer () comprises: a speed reducer input shaft (S) including an input gear (); a speed reducer output shaft (S) including an output gear (); and an intermediate shaft (S) including a small-diameter intermediate gear () and a large-diameter intermediate gear (). The large-diameter intermediate gear () has a circumscribed circle which is superimposed with a pitch circle of a plurality of rolling elements () of the wheel bearing () when viewed from an axial direction.