Safety Device for a Construction Machine

A safety device for a construction machine includes a status information acquisition section that acquires status information pertaining to the status of the construction machine, a seat belt detection section that detects whether an operator is wearing a seat belt, and a control section that controls a warning section so that a warning is given on the basis of the status information when the operator is not wearing the seat belt, in which the status information includes information pertaining to the operation position of a gate lock lever that is manipulated to a lock position in which instructions from operating levers of the construction machine are disabled and a lock release position in which instructions from the operating levers are enabled, and the control section controls the warning section so that a warning is given when the gate lock lever operation position is at the lock release position.