A connector, comprising: a first connector main body including a first power transmission coil capable of transmitting electric power in a non-contact manner, a first signal transmission coil capable of transmitting a signal in a non-contact manner, and a first case in which the first power transmission coil and the first signal transmission coil are provided; and a second connector main body including a second power transmission coil capable of transmitting electric power to and from the first power transmission coil in a non-contact manner, a second signal transmission coil capable of transmitting a signal to and from the first signal transmission coil in a non-contact manner, and a second case in which the second power transmission coil and the second signal transmission coil are provided and which is fittable into a fitting recess of the first case, the fitting recess being formed in a columnar shape having a center axis, wherein in the first connector main body and the second connector main body, the first case and the second case are relatively rotatable about a rotation axis along a fitting direction, which is an axial direction along the center axis, with a positional relation that the first power transmission coil and the second power transmission coil are opposed to each other and the first signal transmission coil and the second signal transmission coil are opposed to each other in a state in which the first case and the second case are mutually fitted, wherein the first power transmission coil, the first signal transmission coil, the second power transmission coil, and the second signal transmission coil are disposed so as to have a positional relation that the power transmission coupling axial direction and the signal transmission coupling axial direction are orthogonal to each other in said mutually fitted state, the first power transmission coil and the second power transmission coil are opposed to each other in said mutually fitted state in the axial direction along the fitting direction, with the power transmission coupling axial direction being in the axial direction, the first signal transmission coil and the second signal transmission coil are opposed to each other in said mutually fitted state in an radial direction orthogonal to the axial direction, with the signal transmission coupling axial direction being in the radial direction, and the first signal transmission coil and the second signal transmission coil are solenoid coils wound in a helical manner around a respective center axis corresponding in said mutually fitted state to the center axis of the fitting recess. a first connector main body including a first power transmission coil capable of transmitting electric power in a non-contact manner, a first signal transmission coil capable of transmitting a signal in a non-contact manner, and a first case in which the first power transmission coil and the first signal transmission coil are provided; and a second connector main body including a second power transmission coil capable of transmitting electric power to and from the first power transmission coil in a non-contact manner, a second signal transmission coil capable of transmitting a signal to and from the first signal transmission coil in a non-contact manner, and a second case in which the second power transmission coil and the second signal transmission coil are provided and which is fittable into a fitting recess of the first case, the fitting recess being formed in a columnar shape having a center axis, wherein in the first connector main body and the second connector main body, the first case and the second case are relatively rotatable about a rotation axis along a fitting direction, which is an axial direction along the center axis, with a positional relation that the first power transmission coil and the second power transmission coil are opposed to each other and the first signal transmission coil and the second signal transmission coil are opposed to each other in a state in which the first case and the second case are mutually fitted, wherein the first power transmission coil, the first signal transmission coil, the second power transmission coil, and the second signal transmission coil are disposed so as to have a positional relation that the power transmission coupling axial direction and the signal transmission coupling axial direction are orthogonal to each other in said mutually fitted state, the first power transmission coil and the second power transmission coil are opposed to each other in said mutually fitted state in the axial direction along the fitting direction, with the power transmission coupling axial direction being in the axial direction, the first signal transmission coil and the second signal transmission coil are opposed to each other in said mutually fitted state in an radial direction orthogonal to the axial direction, with the signal transmission coupling axial direction being in the radial direction, and the first signal transmission coil and the second signal transmission coil are solenoid coils wound in a helical manner around a respective center axis corresponding in said mutually fitted state to the center axis of the fitting recess.