To provide an antenna attaching device capable of temporarily but surely fixing a nut 26 through a pawl washer 18 to the attaching screw 12 of an antenna base 10.
The attaching screw 12 projected downwards from the antenna base 10 is provided with a slit 14 in a screw shaft direction and a locking part 16 is provided so as to close at least a part of the lower end of the slit 14. The pawl washer 18 is provided with a locking tongue piece 20 which can be inserted to the slit 14 from the side and whose downward movement is controlled by the locking part 16. The pawl washer 18 and the nut 26 are connected so as to be relatively rotatable around a screw shaft and not to be separated in the screw shaft direction. The locking tongue piece 20 is inserted to the slit 14 from the side and mounted on the locking part 16. Thus, the nut 26 is temporarily fixed to the attaching screw 10 easily and the nut 26 does not fall down even when an operator releases a hand thereafter.
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