A gas cooled electric rotating machine in which, in operation, a cooling gas is flowed through into a rotor and a stator, wherein the rotor comprises: a shaft having a center hole formed along a center of rotation of the rotor; a pair of collector rings (214,224) installed around an outer periphery of the shaft; a hole for studs (213,223) formed at a machine interior side of the center hole so as to extend in a radial direction from the center hole to an outer peripheral surface of the rotor to allow the center hole and the outer peripheral surface to communicate with each other; a pair of center hole conductors (211,221) inserted into the center hole along the center of rotation while being electrically insulated from the shaft and from each other, the center hole conductors (211,221) including respective end parts (211A,221A) extending along an axial direction of an end of the shaft, wherein each of the end parts (211A,221A) comprises a circumferential surface with respect to a center line of the end parts (211A,221A) parallel to the center of rotation, said circumferential surface serving as an electric connection surface; and a pair of end conductors (212,222) provided at the end of the shaft so as to be each electrically insulated from the shaft, wherein each of the end conductors (212,222) has a hole so that the respective end part (211A,221A) can be fitted into the hole and electrically connected thereto in that an inner peripheral surface of the hole is connected to the circumferential surface of the respective end part (211A,221A) of the pair of center hole conductors (211,221), wherein each of the end conductors (212,222) is electrically connected to a respective one of the pair of collector rings (214,224), wherein the end conductors (212,222) are provided with respective slits (212A,222A) which communicate with the corresponding holes, and the end conductors being further provided with tightening members (231, 232), and wherein the slits (212A,222A) are formed so as to enable a width between the slits (212A,222A) to be reduced using the 10 tightening members (231,232). a shaft having a center hole formed along a center of rotation of the rotor; a pair of collector rings (214,224) installed around an outer periphery of the shaft; a hole for studs (213,223) formed at a machine interior side of the center hole so as to extend in a radial direction from the center hole to an outer peripheral surface of the rotor to allow the center hole and the outer peripheral surface to communicate with each other; a pair of center hole conductors (211,221) inserted into the center hole along the center of rotation while being electrically insulated from the shaft and from each other, the center hole conductors (211,221) including respective end parts (211A,221A) extending along an axial direction of an end of the shaft, wherein each of the end parts (211A,221A) comprises a circumferential surface with respect to a center line of the end parts (211A,221A) parallel to the center of rotation, said circumferential surface serving as an electric connection surface; and a pair of end conductors (212,222) provided at the end of the shaft so as to be each electrically insulated from the shaft, wherein each of the end conductors (212,222) has a hole so that the respective end part (211A,221A) can be fitted into the hole and electrically connected thereto in that an inner peripheral surface of the hole is connected to the circumferential surface of the respective end part (211A,221A) of the pair of center hole conductors (211,221), wherein each of the end conductors (212,222) is electrically connected to a respective one of the pair of collector rings (214,224), wherein the end conductors (212,222) are provided with respective slits (212A,222A) which communicate with the corresponding holes, and the end conductors being further provided with tightening members (231, 232), and wherein the slits (212A,222A) are formed so as to enable a width between the slits (212A,222A) to be reduced using the 10 tightening members (231,232).