To provide a removal tool capable of easily removing a seal member of a resin material fitted in an insertion hole formed in a body of a resin material.

The removal tool 1 is adapted to remove the resin seal member 301 used when attaching a resin valve 101 to the resin body 110 in such a manner that a flow path of the resin body 110 and a valve hole flow path 121 of the resin valve 101 are communicated with each other. The resin seal member 301 is formed in a hollow cylindrical shape and structured to seal by being press-fitted in the insertion hole 113 formed in the resin body 110 and an insertion hole 123 formed in the resin valve 101. The resin seal member 301 has protrusions 33 intermittently formed on an inner peripheral surface thereof. The removal tool 1 includes engagement claws 30 intermittently formed on an outer peripheral surface thereof so as to engage with the protrusions 33.