To provide an electric wire holder capable of performing wiring while temporarily placing electric wires in a holding section of a holder body and performing the locking into a held state after the wiring in which the electric wires are held in the holding section.

The electric wire holder 10 includes: a fixing unit 100; a holder body 60 provided with a holding section 80 that is positioned on the underside of the fixing unit, and in which electric wires 30 can be temporarily placed; and a movable arm 70 that is movably supported by the holder body, and that holds the electric wires temporarily placed in the holding section between the holding section and the movable arm. A lock unit 81 for locking the movable arm in a holding state in which the electric wires are held by the holding section is provided between the movable arm and the holding section. A stationary unit 91 that maintains a non-holding state is provided between the holder body and the movable arm.