To provide a problem detection device capable of detecting a problem of a patient in a toilet, automatically unlocking a toilet door and notifying the outside place of the problem, early discovering and rescuing the patient.

A conversational problem detection device comprises: a sensor part c to detect whether or not a toilet door is locked; a timer circuit part d in which a timer is driven by a signal from the sensor part; an unlocking device part e to automatically unlock a locking device b; an extension button part f having a button to extend the automatic unlocking time of the unlocking device part e; a display and voice part g to notify a patient inside a toilet of automatic unlocking of the toilet door a in advance; a problem communicator h. When the button of the extension button part f is not pressed by the end of a set time of the timer, the unlocking device part e automatically unlocks the locking device b based on a problem signal from the timer circuit part d and the problem communicator h notifies a pre-specified place of the problem.