To provide a hinge for installing a door which enables positioning toward a width direction of the door without use of a purpose-built adjusting bolt.

A fixed member 2, which is fixed to an installation object 10, and a hinge body 3, which supports a door rotatably, are engaged. A rack portion 22 having a plurality of teeth 22a, 22b is provided to a hinge body 3 side. The fixed member 2 is provided with a hole 9 which communicates with the teeth 22a, 22b of the rack portion 22. An engaging tool 24 is inserted into the hole 9 so as to engage with the tooth 22a of the rack portion 22 and the engaging tool 24 presses and moves the tooth 22a of the rack portion 22.