An electronic circuit component mounting head (10, 110) comprising: a head main body; a rotating/raising/lowering axis held on the head main body (12, 112) as to be capable of being rotated about an axis line and raised/lowered in a direction parallel to the axis line; a raising/lowering axis rotating device (80, 82, 84) configured to rotate the rotating/raising/lowering axis with respect to the head main body (12, 112); a first raising/lowering driving device (18, 140) configured to raise/lower the rotating/raising/lowering axis with respect to the head main body (12, 112); a component holding tool (22, 100) configured to hold an electronic circuit component and which is held as to be not capable of being rotated but capable of being raising/lowered relatively to the rotating/raising/lowering axis by the rotating/raising/lowering axis; and a second raising/lowering driving device (60, 66) which is provided outside the component holding tool (22, 100) and the rotating/raising/lowering axis, characterized in that the second raising/lowering driving device (60, 66) is configured to be raised/lowered by the first raising/lowering device (18, 140) together with the rotating/raising/lowering axis, the second raising/lowering driving device (60, 66) includes a holding tool engaging section which is configured to engage the component holding tool (22, 100) in a state which allows rotation of the component holding tool (22, 100) without acting via an elastic member, and the second raising/lowering driving device (60, 66) is configured to raise/lower the component holding tool (22, 100) relative to the rotating/raising/lowering axis by the holding tool engaging section to mount an electronic circuit component on a circuit substrate. a head main body; a rotating/raising/lowering axis held on the head main body (12, 112) as to be capable of being rotated about an axis line and raised/lowered in a direction parallel to the axis line; a raising/lowering axis rotating device (80, 82, 84) configured to rotate the rotating/raising/lowering axis with respect to the head main body (12, 112); a first raising/lowering driving device (18, 140) configured to raise/lower the rotating/raising/lowering axis with respect to the head main body (12, 112); a component holding tool (22, 100) configured to hold an electronic circuit component and which is held as to be not capable of being rotated but capable of being raising/lowered relatively to the rotating/raising/lowering axis by the rotating/raising/lowering axis; and a second raising/lowering driving device (60, 66) which is provided outside the component holding tool (22, 100) and the rotating/raising/lowering axis, characterized in that the second raising/lowering driving device (60, 66) is configured to be raised/lowered by the first raising/lowering device (18, 140) together with the rotating/raising/lowering axis, the second raising/lowering driving device (60, 66) includes a holding tool engaging section which is configured to engage the component holding tool (22, 100) in a state which allows rotation of the component holding tool (22, 100) without acting via an elastic member, and the second raising/lowering driving device (60, 66) is configured to raise/lower the component holding tool (22, 100) relative to the rotating/raising/lowering axis by the holding tool engaging section to mount an electronic circuit component on a circuit substrate.