To provide a torque converter capable of transmitting a driving force while being reduced in the deterioration of efficiency.

The torque converter 1 includes a front cover 40 to which a driving force is inputted from a driving source, a pump shell 12 formed as the shell of a pump impeller 10 and fixed to the front cover 40 so that the driving force is transmitted thereto from the front cover 40, and a turbine shell 22 formed as the shell of a turbine runner 20 and arranged in opposition to the pump impeller 10. The converter transmits the driving force inputted to the front cover 40 from the pump impeller 10 to the turbine runner 20 using fluid as a medium. An annular member 50 is provided extending from a torus TR composed of the front cover 40 and the pump shell 12 close to the outer wall face of the turbine shell 22.