To provide a compact rotary bearing with which a detector mounted and adjusted in a factory to eliminate the need for maintenance is integrated.

This rotary bearing with an integrated detector is applied to ensure the rotation of a moving structure for a chassis by a toothed ring. The rotary bearing has a rotation ring 2 and a non-rotation ring 1, a row of rotation members disposed between them, and a position detector 4 integrated with the rotary bearing. The position detector 4 has a magnetized encoder 3.