A power drive circuit having push-pull type output transistors connected in series between power supplies. The power drive circuit comprises an idling loop for providing output transistors Q10 and Q12 with idling current based on a reference idling current which is increased or decreased in accordance with the currents flowing through the respective output transistors as detected by respective current detecting transistors Q13 and Q14. The invention prevents unnecessary oscillations in the circuit if the output current is very large, without resorting to an oscillation preventive capacitor, thereby enabling a cost saving power drive circuit.