A barbecue grill includes a lid, and a temperature detection device mounted on the lid. The temperature detection device includes a movable plate, a control handle, and a temperature detector. Thus, the temperature probe of the temperature detector is extended into the inside of the lid to detect the temperature in the inside of the lid so as to facilitate a user monitoring the temperature in the inside of the lid, thereby preventing the food contained in the lid from being broiled too excessively.