The purpose of the invention is to reliably cut a subject to be cut by continuously generating a biasing force that pushes together edge faces of a pair of blades when closing the pair of blades. The present invention provides scissor forceps (1) including: a base (6); a pair of blades (2a, 2b) which are attached so as to be pivotable in relation to each other about a pivot shaft (4) secured to the base in a state in which the blades are disposed over each other in the pivot shaft direction, the movement of the blades in the direction along the pivot shaft being limited at the position of the pivot shaft; and a drive mechanism (3) that drives the blades. The drive mechanism includes: a force transmission member (9) which transmits a pulling force; a pivoting mechanism (10) which is provided on the base end side of the blades relative to the pivot shaft and which converts a portion of the pulling force transmitted by the force transmission member into force for pivoting the blades; and a pressing mechanism (11) which converts the other portion of the pulling force at every pivoting position of the blades by the pivoting mechanism into force for separating the blades at the base end side of the blades relative to the pivot shaft in the direction in which the blades are disposed over each other.L'objectif de l'invention est de découper de manière fiable un sujet à découper en générant en continu une force de sollicitation qui pousse les faces de bord d'une paire de lames l'une vers l'autre lors de la fermeture de la paire de lames. La présente invention concerne une pince à ciseaux (1) comprenant : une base (6) ; une paire de lames (2a, 2b) qui sont fixées de manière à ce qu'elles puissent pivoter l'une par rapport à l'autre autour d'un arbre de pivot (4) solidaire de la base dans un état dans lequel les lames sont ménagées l'une sur l'autre dans la direction de l'arbre de pivot, le mouvement des lames dans la direction le long de l'arbre de pivot étant limité au nivea