Abstract: A rebar tying tool may include: a reel comprising a bobbin and a wire wound around the bobbin; a reel attaching part to which the reel is rotatably attached; a feeding unit configured to feed the wire from the bobbin around rebars; a twisting unit configured to twist the wire around the rebars; a type detector configured to detect a type of the reel; and a support supporting the reel attaching part, the feeding unit, the twisting unit, and the type detector. The type detector may include a movable member configured to move with respect to the support. The movable member may be at an initial position when the reel is not attached to the reel attaching part. The movable member may be at an attaching position according to the type of the reel when the reel is attached to the reel attaching part.