To solve a problem that abrasion powder is generated by contact between an outer peripheral member having a circular inner peripheral surface, an outer peripheral surface of a shaft body coaxially arranged with the outer peripheral member or a roller current collector and a spacer and results in the performance deterioration of a connector.

A connector includes: an outer peripheral member having a circular inner peripheral surface; a shaft body rotatably and coaxially arranged with the outer peripheral member; and a rotatable roller current collector conducting planet movements between the outer peripheral member and the shaft body. In the connector, a rotatable rotation spacer is disposed in a space formed by the outer peripheral member, the shaft body, and the roller current collector. The connector includes a guide spacer having a revolution orbit groove restricting the revolution orbit of the rotation spacer. The structure inhibits contact between the rotation spacer and the outer peripheral member, the shaft body, or the roller current collector to prevent the occurence of powder dust.