PROBLEM TO BE SOLVED: To provide a connector for hemostasis, a catheter with a connector, and a connector catheter kit capable of suppressing blood leakage in introducing a catheter into a body along a guide wire.SOLUTION: A balloon catheter 10 includes a catheter tube, and a hub 12 provided at its base end part. An inner tube 16 of the catheter tube has an inner pipe hole 19 into which a guide wire G can be inserted, and the inner pipe hole 19 is communicated with a pipe hole 25a of the hub 12. A connector 30 for hemostasis is connected to a base end side of the hub 12. The connector 30 for hemostasis has an insertion passage 50 that is communicated with the pipe hole 25a. The connector 30 for hemostasis also has a hemostatic valve 32 in which a plurality of slits 48 are radially formed. A slit communication part 49 where the slits 48 are communicated with each other constitutes part of the insertion passage 50, and the passage cross section area is smaller than the cross section area of the inner pipe hole 19 of the inner tube 16.
