To provide a positioning implement and a positioning method for a sash frame, which facilitate a sash frame positioning operation.

This positioning implement G for the sash frame is used for positioning a frame body while supporting a head of a sash frame body when a sash is erected in an opening of a building. The positioning implement G comprises: a fixing member 1 which is fixed to a skeleton; a supporting member 2 which is provided in the fixing member 1, and which supports the head of the sash frame body from the downside in such a manner as to be movable in the horizontal direction of the in-plane direction of the sash; a height-direction movement means 3 for moving the supporting member 2 in the height direction of the sash by a screw shank 34 and a nut member 33; and a coming and going-direction movement means for moving the supporting member 2 in the out-of-plane direction of the sash by a screw shank 42 and a nut member 41.