To provide a terminal alignment plate capable of alleviating stress added on a connecting part between contacts and a printed wiring board while maintaining an alignment state of the contacts, and to provide a mounting component with a terminal alignment plate.

The terminal alignment plate has a plurality of terminal retaining holes and a plurality of slits formed. The plurality of terminal retaining holes have a plurality of connecting terminals inserted. Each of the plurality of slits is communicated with at least one of the terminal retaining holes, and is opened to the other end part of the terminal alignment plate. The terminal alignment plate is equipped with a first knob part. The first knob part moves the terminal alignment plate in a direction for the connecting terminals to slip out to a slit side from a penetrated state, as a force is added from the slits in a direction of the terminal retaining holes communicated with the slits.