A puncture treatment tool (1, 51) comprising: a needle tube having a distal end that is insertable into a tissue; a flexible sheath through which the needle tube is inserted; and an operation section (30, 30A, 30B) disposed at a proximal end side of the needle tube and the sheath, the operation section (30, 30A, 30B) including: a cylindrical main body to which a proximal end part of the sheath is fixed, and through which a proximal end part of the needle tube is inserted; a needle stopper attached to the main body, the needle stopper being provided such that a position where the needle stopper is fixed to the main body changes in a direction of a longitudinal axis of the main body, the needle stopper including a knob configured to selectively shift between a state in which the needle stopper is freely movable relative to the main body and another state in which the needle stopper is fixed to the main body; and a slider fixed to the proximal end part of the needle tube that protrudes from the proximal end part of the sheath, the slider being movable relative to the main body at a position more proximal to the main body than the needle stopper in an axial direction of the needle tube, and a relative movement range of the slider with respect to the main body being determined by abutting against the needle stopper, wherein the slider includes a switch (45, 52) configured to selectively switch between a first state in which the slider is movable in the axial direction relative to the main body without rotating in a circumferential direction of the main body and a second state in which the slider is rotatable in the circumferential direction relative to the main body. a needle tube having a distal end that is insertable into a tissue; a flexible sheath through which the needle tube is inserted; and an operation section (30, 30A, 30B) disposed at a proximal end side of the needle tube and the sheath, the operation section (30, 30A, 30B) including: a cylindrical main body to which a proximal end part of the sheath is fixed, and through which a proximal end part of the needle tube is inserted; a needle stopper attached to the main body, the needle stopper being provided such that a position where the needle stopper is fixed to the main body changes in a direction of a longitudinal axis of the main body, the needle stopper including a knob configured to selectively shift between a state in which the needle stopper is freely movable relative to the main body and another state in which the needle stopper is fixed to the main body; and a slider fixed to the proximal end part of the needle tube that protrudes from the proximal end part of the sheath, the slider being movable relative to the main body at a position more proximal to the main body than the needle stopper in an axial direction of the needle tube, and a relative movement range of the slider with respect to the main body being determined by abutting against the needle stopper, wherein the slider includes a switch (45, 52) configured to selectively switch between a first state in which the slider is movable in the axial direction relative to the main body without rotating in a circumferential direction of the main body and a second state in which the slider is rotatable in the circumferential direction relative to the main body. a cylindrical main body to which a proximal end part of the sheath is fixed, and through which a proximal end part of the needle tube is inserted; a needle stopper attached to the main body, the needle stopper being provided such that a position where the needle stopper is fixed to the main body changes in a direction of a longitudinal axis of the main body, the needle stopper including a knob configured to selectively shift between a state in which the needle stopper is freely movable relative to the main body and another state in which the needle stopper is fixed to the main body; and a slider fixed to the proximal end part of the needle tube that protrudes from the proximal end part of the sheath, the slider being movable relative to the main body at a position more proximal to the main body than the needle stopper in an axial direction of the needle tube, and a relative movement range of the slider with respect to the main body being determined by abutting against the needle stopper, wherein the slider includes a switch (45, 52) configured to selectively switch between a first state in which the slider is movable in the axial direction relative to the main body without rotating in a circumferential direction of the main body and a second state in which the slider is rotatable in the circumferential direction relative to the main body.