The present invention relates to a locking device for a wandering sensor, worn by a dementia patient, capable of monitoring a position of the dementia patient. According to the present invention, the locking device (1) includes: a first buckle (100) including a first locking tool (110) and a first housing (120); and a second buckle (200) including a second locking tool (210) and a second housing (220). When a second inlet (223) of the second housing (220) is inserted into a first inlet (123) of the first housing (120) in a position in which a pair of left and right first hanging holes (121) and a pair of left and right second hanging holes (221) are matched with each other, a fist hanging step (113) and a second hanging step (213) are hung on one of the first hanging holes (121) and one of the second hanging holes (221) while another first hanging step (113) and another second hanging step (213) are hung on the other one of the hanging holes (121) and the other one of hanging holes (221). Therefore, the first buckle (100) and the second buckle (200) are locked. When two first button parts (114) and two second button parts (214) are pressurized inward at the same time while the second inlet (223) of the second housing (220) is separated from the first inlet (123) of the first housing (120), the first hanging step (113) and the second hanging step (213) are separated from the first hanging hole (121) and the second hanging hole (221). Therefore, the first buckle (100) and the second buckle (200) are separated.;COPYRIGHT KIPO 2016
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