An angle detection apparatus comprising: a resolver that is provided with a first system excitation winding, first system two output windings (111A, 112A), a second system excitation winding, and second system two output windings (111B, 112B), in which magnetic interference occurs between a first system and a second system, wherein a rotor is arranged in a radial-direction inner side of a stator, the first system excitation winding, the first system two output windings (111A, 112A), the second system excitation winding, and the second system two output windings (111B, 112B) being wound around the same one stator, or wherein a rotor is arranged in a radial-direction inner side of a first system stator and a second system, the first system excitation winding and the first system two output windings (111A, 112A) being wound around the first system stator, and the second system excitation winding and the second system two output windings (111B, 112B) being wound around a second system stator, the first system stator and the second system stator being arranged adjacent to each other in the axial direction; a first system excitation unit that applies AC voltage of a first cycle time to the first system excitation winding; a second system excitation unit that applies AC voltage of a second cycle time longer than the first cycle time, to the second system excitation winding; a first system output signal detection unit that detects periodically output signals (V1A, V2A) of the first system two output windings (111A, 112A) at preliminarily set detection timing; a first system removal processing unit that performs a second cycle component removal processing which removes component of the second cycle time, to detection values (V1A_S, V2A_S) of the output signals of the first system two output windings; and a first system angle calculation unit that calculates a first angle (θ1) of the resolver, based on the detection values (V1A_F, V2A_F) of the output signals of the first system two output windings after the second cycle component removal processing. a resolver that is provided with a first system excitation winding, first system two output windings (111A, 112A), a second system excitation winding, and second system two output windings (111B, 112B), in which magnetic interference occurs between a first system and a second system, wherein a rotor is arranged in a radial-direction inner side of a stator, the first system excitation winding, the first system two output windings (111A, 112A), the second system excitation winding, and the second system two output windings (111B, 112B) being wound around the same one stator, or wherein a rotor is arranged in a radial-direction inner side of a first system stator and a second system, the first system excitation winding and the first system two output windings (111A, 112A) being wound around the first system stator, and the second system excitation winding and the second system two output windings (111B, 112B) being wound around a second system stator, the first system stator and the second system stator being arranged adjacent to each other in the axial direction; a first system excitation unit that applies AC voltage of a first cycle time to the first system excitation winding; a second system excitation unit that applies AC voltage of a second cycle time longer than the first cycle time, to the second system excitation winding; a first system output signal detection unit that detects periodically output signals (V1A, V2A) of the first system two output windings (111A, 112A) at preliminarily set detection timing; a first system removal processing unit that performs a second cycle component removal processing which removes component of the second cycle time, to detection values (V1A_S, V2A_S) of the output signals of the first system two output windings; and a first system angle calculation unit that calculates a first angle (θ1) of the resolver, based on the detection values (V1A_F, V2A_F) of the output signals of the first system two output windings after the second cycle component removal processing.