A tablet computer having a detachable handle includes a tablet main body equipped with a connecting board on a bottom surface thereof, and a grip unit removably connecting to the connecting board of the tablet main body. The grip unit is convenient to a user to easily hold the tablet main body with only one hand, and input with the other hand. An extended battery is stored in a chamber of the grip unit can supply power to the tablet main body and/or a main battery in the tablet main body. The grip unit further includes a barcode scanner and a scan start button so that a user can hold the grip unit with one hand and trigger the barcode scanner with the index finger thereof.