Electronic component feeder and electronic component mounting device

The present invention provides an electronic component feeder that reduces the interruption period of feeding interruption of electronic components and reduces the cost of the apparatus. The electronic component feeder includes a transfer head that is disposed in the first space and is movable over a tray on which a plurality of electronic components are mounted; a first shuttle member and a second shuttle member which are movable between the first space and the second space so as to be movable in the vertical direction between the transfer head and the tray, and the electronic components transferred by the transfer head from the tray are conveyed to a mounting head; a relative position determining section that determines whether or not a part of the horizontal tray is overlapped with at least one of the first shuttle member and the second shuttle member; and a transfer head control section that controls the transfer head so that the electronic component is moved from the tray is conveyed to at least one of t