The wire feed mechanism (100) includes a feed roll (310), a pressure roll (320), a pressure arm (330), and a pressure mechanism (340). The feed roll (310) rotates around a rotation axis. The pressure roll (320) is displaceable relative to the feed roll (310). The pressure arm (330) has a first end and a second end that are separate from each other, and rotatably supports the pressure roll (320). The pressure mechanism (340) engages with the pressure arm (330) so that a pressure force is applied from the pressure roll (320) to the feed roll (310) with a wire (W) held between the feed roll (310) and the pressure roll (320). A force-receiving portion (331) is provided at an end of the pressure arm (330). When the pressure roll (320) presses the feed roll (310), the pressure mechanism (340) applies a force to the force-receiving portion (331) in a direction that is substantially parallel to the direction in which the wire (W) is fed.