To provide a harness board fastener by which an automatic cable tying member can favorably be positioned and fixed to a fastener, and which has an improved attaching device.

The attaching device may be provided on the same side as an arc-like wire bundle supporting surface of this fastener, or may be provided on both sides. When the attaching device is attached on the same side, a large number of the attaching devices or arranging devices can be arranged to be close to each other. An opposite side which forms the front side of the fastener may be opened in a manner to define a wire bundle inlet and an outlet path by which an easy access is possible. The fastener preferably includes an attaching structure which surely accepts a push mount and freely releasably holds the push mount by snap fitting. This structure is substantially oriented in the vertical direction to the base of the fastener, or forms a specified angle.