It is intended to realize compactness in device size for a torque converter including a lock-up device using a centrifugal clutch. The present torque converter (1) includes a front cover (2), an impeller (10), a turbine (11), a stator (12) and a centrifugal clutch (4). The impeller (10) is coupled to the front cover (2), forms a hydraulic oil chamber together with the front cover (2), and includes an impeller core (17). The turbine (11), from which power is outputted, is provided in opposition to the impeller (10) and includes the turbine core (22). The stator (12) is disposed between an inner peripheral part of the impeller (10) and that of the turbine (11), and regulates the flow of hydraulic oil flowing from the turbine (11) to the impeller (10). The centrifugal clutch (4) is disposed in a space between the impeller core (17) and the turbine core (22), and directly transmits the power from the impeller (10) to the turbine (11) when a rotational speed of the turbine (11) is greater than or equal to a predetermined value.