AbstractThis proposes a resistor‐coupled gate with high current density using Josephson elements. In a superconductive logic circuit the input‐output connections must be made using strip lines when the distance between logic gates is increased. In such a case the logic gate must be designed with consideration of the characteristic impedance of the strip line. In the usual design of the logic gate, however, the current density of the Josephson element is limited at the upper and lower sides by the characteristic impedance of the strip line, when the probabilities of punchthrough and misoperation by thermal noise are to be suppressed below a certain value. Then the operating speed of the logic gate is accordingly limited. In order to overcome such limitation, this paper first indicates by calculation that the output voltage should be increased. By connecting two Josephson elements in series, a resistor‐coupled step‐up gate is constructed. This logic gate has the feature that the Josephson current density is increased and the probability of punchthrough misoperation is drastically decreased. A high‐speed logic gate with better overdrive characteristics can be realized. Consequently, the proposed resistor‐coupled gate with high current density can be applied to high‐speed logic circuits.