A tool changer (10, 104) comprising: a slider configured to be provided on a back surface side or a front surface side of a table (16, 110) of a press brake, and configured to slide in a right-left direction along a tool installation part (12, 106) of the table (16, 110), a finger provided in the slider, configured to be inserted into an engagement hole (18h, 112h) extending through a tool (14, 108) and to move in a front-rear direction, and configured to support the tool (14, 108), and the finger includes a large-diameter portion on a base end side, includes a small-diameter portion configured to be inserted into the engagement hole (18h, 112h) of the tool (14, 108) on a tip side, and includes an outer stepped portion configured to abut on the tool (14, 108) between the large-diameter portion and the small-diameter portion, characterized in that: an engagement member configured to be swingable to be capable of being protruded and retracted relative to an outer peripheral surface of the finger on a tip side, and to be engaged with a peripheral edge portion of the engagement hole (18h, 112h) of the tool (14, 108) or an inner stepped portion (18hc, 112hc) formed at an intermediate position of the engagement hole (18h, 112h), and an operation rod that is provided in the finger movably in the front-rear direction is configured to push and pull the engagement member to swing the engagement member, wherein the finger is configured to clamp the tool (14, 108) between the engagement member protruded from the outer peripheral surface on the tip side and the outer stepped portion. a slider configured to be provided on a back surface side or a front surface side of a table (16, 110) of a press brake, and configured to slide in a right-left direction along a tool installation part (12, 106) of the table (16, 110), a finger provided in the slider, configured to be inserted into an engagement hole (18h, 112h) extending through a tool (14, 108) and to move in a front-rear direction, and configured to support the tool (14, 108), and the finger includes a large-diameter portion on a base end side, includes a small-diameter portion configured to be inserted into the engagement hole (18h, 112h) of the tool (14, 108) on a tip side, and includes an outer stepped portion configured to abut on the tool (14, 108) between the large-diameter portion and the small-diameter portion, characterized in that: an engagement member configured to be swingable to be capable of being protruded and retracted relative to an outer peripheral surface of the finger on a tip side, and to be engaged with a peripheral edge portion of the engagement hole (18h, 112h) of the tool (14, 108) or an inner stepped portion (18hc, 112hc) formed at an intermediate position of the engagement hole (18h, 112h), and an operation rod that is provided in the finger movably in the front-rear direction is configured to push and pull the engagement member to swing the engagement member, wherein the finger is configured to clamp the tool (14, 108) between the engagement member protruded from the outer peripheral surface on the tip side and the outer stepped portion. an engagement member configured to be swingable to be capable of being protruded and retracted relative to an outer peripheral surface of the finger on a tip side, and to be engaged with a peripheral edge portion of the engagement hole (18h, 112h) of the tool (14, 108) or an inner stepped portion (18hc, 112hc) formed at an intermediate position of the engagement hole (18h, 112h), and an operation rod that is provided in the finger movably in the front-rear direction is configured to push and pull the engagement member to swing the engagement member, wherein the finger is configured to clamp the tool (14, 108) between the engagement member protruded from the outer peripheral surface on the tip side and the outer stepped portion.