AUXILIARY MIRROR FASTENING DEVICE

An auxiliary mirror fastening device has a first fastening strap, a second fastening strap, an abutting portion, a first operation member that has a first press surface, and a second operation member that has a second press surface. The second fastening strap is pullable through between the first press surface and the abutting portion when the first operation member is in a first state, and is clamped by the first press surface and the abutting portion when the first operation member is moved from the first state to a second state. When the second operation member is in an unoperated initial state, the second press surface clamps the second fastening strap against the abutting portion.