An emitter-follower circuit includes a bipolar transistor of a first conductivity type operating as an emitter-follower transistor and a bipolar transistor of a second conductivity type operable as a clamping transistor. The voltage developed between the base and the emitter of the second conductivity type clamping transistor is adapted to clamp the voltage developed between the base and the collector of the first conductivity type transistor, so that such a high voltage as exceeding the breakdown voltage is not developed between the collector and the emitter of the first conductivity type transistor. The emitter-follower circuit is capable of operating with safety even when an input signal applied thereto has a wide range of direct current components.