The Avia B-534 was a single-seat unequal-span biplane fighter aircraft. The fuselage used a rectangular structure composed of steel tubes, which were attached together using a mixture of bolts and rivets and braced together using streamline wires. The wing, which had a riveted steel structure and fabric covering, was attached to the fuselage using "N" struts; similar struts were present in the outer section of the wings attaching the wings together. The forward section of the fuselage was covered with detachable metal panels, while the rear section had a fabric covering.