PROBLEM TO BE SOLVED: To provide a watching device capable of ensuring the safety of a patient to be attended and a carer even when something wrong has happened to the carer.SOLUTION: Provided is a watching device 10 for watching a patient being a person or an animal to be attended by a carer which comprises: a detection unit 11 for detecting over time a patient to be attended and a carer in a detection area 110 consisting of a first area 111 where the patient should stay and a neighboring second area 112 a determination unit 12 for determining whether the state in which either the patient to be attended or the carer can be detected, or none of them can be detected in the detection area 110 continues for a first threshold length of time or longer on the basis of a detection result by the detection unit 11 and a notification unit 13 for sending a third party a first notice indicating that something wrong has happened to the patient to be attended or the carer when the state in which either the patient to be attended or the carer can be detected, or none of them can be detected in the detection area 110 continues for the first threshold length of time or longer.
