To satisfactorily prevent a laser hazard caused in a non-fitting state using a simple structure. A connector body is included that includes a lens and a diffusion section, the lens performing formation with respect to light that exits a light emitter, and causing light obtained by the formation to exit the lens, the diffusion section causing the light obtained by the formation performed by the lens to diffusely exit the diffusion section. For example, the diffusion section includes a microlens array or a diffusion plate. For example, a position regulator that regulates a fitting position at which the connector body fits a facing connector, is further included.