To permit a heater to be used not only as the one for a barbecue but also as the firewood one being suitable for boiling cooking.

In configuration, at least one of the enclosures 2 for forming a barbecue heater body 1 is made to fall so as to form a firewood entering opening part 3. Boiling cooking, etc., is executed since cooking is enabled by strong heat power with firewood as fuel, firewood fuel is easily replenished from the firewood entering opening part when its quantity becomes small at the time of usage as the firewood heater and no disturbance is given to fuel burning since a large quantity of air for burning comes-in from the firewood opening part so that strong heat power being excellent as the firewood heater is obtained.