An electronic parts mounting apparatus includes an index rotary member. The index rotary member is rotated. A plurality of mounted heads are provided on the index rotary member for sucking electronic components, and for mounting the electronic components on a printed circuit board. The mounting heads are vertically moved through a stoke relative to the printed circuit board. The stroke of movement of the mounting heads is adjusted. A vertically-movable table is provided on a horizontally-movable table. Clampers are supported on the vertically-movable table for holding the printed circuit board therebetween. The vertically-movable table is vertically moved to adjust a height of the printed circuit board held between the clampers.