PROBLEM TO BE SOLVED: To provide a mattress replacement time notification device which notifies any one of a user, a helper and an administrator of the expiration of the lifetime of a mattress before the mattress suffers from wear-out, and prompts any one of the user, the helper and the administrator to replace the mattress.SOLUTION: A mattress replacement time notification device 1 comprises: a mattress 5； a load sensor 11 which is placed under the mattress 5 for detecting a load applied to the mattress 5； a summation unit for summing up the time for which a load read by the load sensor 11 is equal to a specified value or higher； and an LED 13 for notifying the arrival of the replacement time of the mattress 5 when the value of the integration part has reached a first preset value.
