The present invention relates to a high-pressure container and a method of producing a high-pressure container. A high-pressure container includes a plurality of body parts arranged side by side, andeach of the body parts has a cylindrical shape and has an opening at at least one of its axially opposite end portions. The high-pressure container also includes a cap configured to close the openingsof the body parts as a unit, and a communication channel provided inside the cap for communicating interiors of the body parts with each other.