Disclosed is a pet hair cutting device comprising: a body (100) of which one side is to be insertedly coupled to a flexible connecting pipe (103) to be connected with an intake suction port (102) of a vacuum suction means (101), wherein a first connection part (110) is further provided to the other side of the body (100) and a cutting body (200) to be connected to the first connection part (110) of the body (100) is further provided, wherein the cutting body (200) comprises: a housing part (210) including, so as to be exposed to the outside, a motor insertion part (213), a motor (214) to be inserted into the motor insertion part (213), a power supply part (215) for providing power to the motor (214), and a switch (216) a fixing rib (220) for connecting and fixing the housing part (210) and the motor insertion part (213) and a cutting blade housing part (230) including a rotation part (233) to be coupled to a motor shaft (214a) of the motor (214) of the housing part (210), an interlocking part (235) of which a second retaining surface (235a), which corresponds to a plurality of first retaining surfaces (233a) of the rotation part (233), is provided to the outer surface thereof so as to be inserted into the rotation part (233) and of which a rotation shaft (234) extends therefrom, a rotation cutting blade (240) insertedly fixed to the rotation shaft (234) of the interlocking part (235) and having a rotation cutting blade part (241), a fixed cutting blade (250) coming into close contact with the rotation cutting blade (240) and including a fixed cutting blade part (251), and a cutting blade insertion part (236) to which the fixed cutting blade (250) is insertedly fixed, wherein an intake suction part (260) including: a sixth connection part (261), provided at one side thereof, to be connected to a fifth connection part (232) of the cutting blade housing part (230) and a brush part (262) provided at the other side thereof, and is further provided.Linvention concerne un
