PURPOSE: To dispense with the fitting position adjustment of detectors at the site by providing a fitting member integrally holding multiple detectors at the preset positions.

CONSTITUTION: Multiple detectors 1 are fitted to a main detector fitting member 22 at a preset interval perpendicular to a hoistway. A sub-detector fitting member 23 is connected via fitting bolts 31 extendedly on the lower side of the main detector fitting member 22. A cover member 32 covering an opening section formed on the opposite side to the fitting section of the detectors 1 of a detector fitting member 21 constituted of the main detector fitting member 22 and the sub-detector fitting member 23 is provided. For fitting them to the hoistway, one-end sections of brackets 9a, 9b are fixed perpendicularly to a guide rail 8, and the main detector fitting member 22 is vertically fitted at the other end section while the reference line 27 displayed on the side face is matched with the preset position in the hoistway, and the gap and perpendicularity between the guide rail 8 and the main detector fitting member 22 are correctly adjusted.