A rotational force driving assembly (6), a process cartridge (1) including the rotational force driving assembly (6), and an image forming device are provided. The rotational force driving assembly (6) is disposed on an end of the process cartridge (1), and configured to receive a rotational force from outside and transmit a driving force to a rotating member that is disposed in the process cartridge (1) along a length direction of the process cartridge (1), where the rotational force driving assembly (6) includes a rotational force receiving component (61) and an adjusting mechanism (63); and the adjusting mechanism (63) is connected to the rotational force receiving component (61), and enables the rotational force receiving component (61) to shift in a longitudinal direction of the process cartridge (1) and enables an axis of the rotational force receiving component (61) to offset with respect to an axis of a photosensitive member (1003). The rotational force driving assembly (6) facilitates installation of
