A repeated moment generation device, comprising: a principal shaft that is for transmitting a repeated torsional moment; two principal bearing members (2a, 2b) that rotatably hold the principal shaft; two lever members (3a, 3b) that are attached to the principal shaft at positions separated in a shaft center direction of the principal shaft in a state in which each of the lever members (3a, 3b) perpendicularly intersects a shaft center of the principal shaft; two principal eccentric weight rotors (6, 7) that are provided at shaft bodies (4, 5) that are rotatably and axially supported by the lever members (3a, 3b) in a state in which each of the two principal eccentric weight rotors (6, 7) is parallel to the principal shaft, at symmetrical positions with the principal shaft interposed therebetween in a region where the lever members (3a, 3b) face each other; two auxiliary eccentric weight rotors (12, 13) that are provided such that each of the two auxiliary eccentric weight rotors (12, 13) is rotatable about a shaft body (10, 11) that is parallel to the principal shaft, between two pairs of auxiliary bearing members (8a, 8b, 9a, 9b) provided at members that are continued from the principal bearing members (2a, 2b); and drive means for causing the two principal eccentric weight rotors (6, 7) and the two auxiliary eccentric weight rotors (12, 13) to synchronously rotate, characterized in that: eccentricity directions of centers of gravity of the two principal eccentric weight rotors (6, 7) are different from each other by 180 degrees around shaft centers thereof; eccentricity directions of centers of gravity of the two auxiliary eccentric weight rotors (12, 13) are different from each other by 180 degrees around shaft centers thereof; and the eccentricity direction of the center of gravity of one of the two principal eccentric weight rotors (6, 7) and the eccentricity direction of the center of gravity of one of the two auxiliary eccentric weight rotors (12, 13) located on the same side as one of the two principal eccentric weight rotors (6, 7) with respect to the principal shaft are different from each other by 180 degrees around the shaft centers thereof. a principal shaft that is for transmitting a repeated torsional moment; two principal bearing members (2a, 2b) that rotatably hold the principal shaft; two lever members (3a, 3b) that are attached to the principal shaft at positions separated in a shaft center direction of the principal shaft in a state in which each of the lever members (3a, 3b) perpendicularly intersects a shaft center of the principal shaft; two principal eccentric weight rotors (6, 7) that are provided at shaft bodies (4, 5) that are rotatably and axially supported by the lever members (3a, 3b) in a state in which each of the two principal eccentric weight rotors (6, 7) is parallel to the principal shaft, at symmetrical positions with the principal shaft interposed therebetween in a region where the lever members (3a, 3b) face each other; two auxiliary eccentric weight rotors (12, 13) that are provided such that each of the two auxiliary eccentric weight rotors (12, 13) is rotatable about a shaft body (10, 11) that is parallel to the principal shaft, between two pairs of auxiliary bearing members (8a, 8b, 9a, 9b) provided at members that are continued from the principal bearing members (2a, 2b); and drive means for causing the two principal eccentric weight rotors (6, 7) and the two auxiliary eccentric weight rotors (12, 13) to synchronously rotate, characterized in that: eccentricity directions of centers of gravity of the two principal eccentric weight rotors (6, 7) are different from each other by 180 degrees around shaft centers thereof; eccentricity directions of centers of gravity of the two auxiliary eccentric weight rotors (12, 13) are different from each other by 180 degrees around shaft centers thereof; and the eccentricity direction of the center of gravity of one of the two principal eccentric weight rotors (6, 7) and the eccentricity direction of the center of gravity of one of the two auxiliary eccentric weight rotors (12, 13) located on the same side as one of the two principal eccentric weight rotors (6, 7) with respect to the principal shaft are different from each other by 180 degrees around the shaft centers thereof. eccentricity directions of centers of gravity of the two principal eccentric weight rotors (6, 7) are different from each other by 180 degrees around shaft centers thereof; eccentricity directions of centers of gravity of the two auxiliary eccentric weight rotors (12, 13) are different from each other by 180 degrees around shaft centers thereof; and the eccentricity direction of the center of gravity of one of the two principal eccentric weight rotors (6, 7) and the eccentricity direction of the center of gravity of one of the two auxiliary eccentric weight rotors (12, 13) located on the same side as one of the two principal eccentric weight rotors (6, 7) with respect to the principal shaft are different from each other by 180 degrees around the shaft centers thereof.