This connector can be connected to a counterpart connector having a counterpart contact, and is provided with an electric current sensor function. Specifically, the connector is provided with a contact, a protective member composed of an insulating material, a core, and an electric current detection member. The contact extends along the longitudinal direction so as to have a longitudinal part that can be connected to the counterpart contact. The protective member surrounds the contact in the plane orthogonal to the longitudinal direction. The core surrounds the protective member in the plane orthogonal to the longitudinal direction. The core has a gap. The electric current detection member is at least partially disposed within the gap.