A tray component supply apparatus comprises a main body side replenishment tray holding section 50 provided at an upper part over a tray stocker 40 of an apparatus main body 30 and a tray discharge section 60 provided at a lower part under the tray stocker 40 of the apparatus main body 30. The tray stocker 40 is provided with a tray stocker side replenishment tray holding section 80 on a top plate 44 thereof and empty tray holding members 85 on a bottom plate 43 thereof.