A power transmitting apparatus comprising: a clutch housing that rotates with the rotation of an input member and to which a plurality of driving clutch plates are attached; a clutch member to which a plurality of driven clutch plates formed alternately with the driving clutch plates of the clutch housing are attached and that is connected to an output member; a pressure member that is attached to the clutch member and that can bring the driving clutch plates and the driven clutch plates into pressure contact or release pressure-contact force, with its axial movement relative to the clutch member; a biasing means that biases the pressure member in a direction such that the driving clutch plates and the driven clutch plates come into pressure contact; a pressure-contact assisting cam that, when the rotational force input to the input member can be transmitted to the output member and the pressure member and the clutch member rotate relative to each other, can increase the pressure-contact force between the driving clutch plates and the driven clutch plates; and a back torque limiter cam that, when the rotation of the output member exceeds the rotational speed of the input member and the pressure member and the clutch member rotate relative to each other, releases the pressure-contact force between the driving clutch plates and the driven clutch plates, the power transmitting apparatus being capable of transmitting or cutting off rotational force input to the input member to the output member by bringing the driving clutch plates and the driven clutch plates into pressure contact or releasing pressure-contact force, characterised in that a receiving portion for the biasing means on the pressure member side comprises at least one receiving member separate from the pressure member, a first cam surface and a second cam surface constituting one of the pressure-contact assisting cam and the back torque limiter cam are respectively formed on the at least one receiving member and the clutch member, and a third cam surface and a fourth cam surface constituting the other of the pressure-contact assisting cam and the back torque limiter cam are respectively formed on the pressure member and the clutch member. a clutch housing that rotates with the rotation of an input member and to which a plurality of driving clutch plates are attached; a clutch member to which a plurality of driven clutch plates formed alternately with the driving clutch plates of the clutch housing are attached and that is connected to an output member; a pressure member that is attached to the clutch member and that can bring the driving clutch plates and the driven clutch plates into pressure contact or release pressure-contact force, with its axial movement relative to the clutch member; a biasing means that biases the pressure member in a direction such that the driving clutch plates and the driven clutch plates come into pressure contact; a pressure-contact assisting cam that, when the rotational force input to the input member can be transmitted to the output member and the pressure member and the clutch member rotate relative to each other, can increase the pressure-contact force between the driving clutch plates and the driven clutch plates; and a back torque limiter cam that, when the rotation of the output member exceeds the rotational speed of the input member and the pressure member and the clutch member rotate relative to each other, releases the pressure-contact force between the driving clutch plates and the driven clutch plates, the power transmitting apparatus being capable of transmitting or cutting off rotational force input to the input member to the output member by bringing the driving clutch plates and the driven clutch plates into pressure contact or releasing pressure-contact force, characterised in that a receiving portion for the biasing means on the pressure member side comprises at least one receiving member separate from the pressure member, a first cam surface and a second cam surface constituting one of the pressure-contact assisting cam and the back torque limiter cam are respectively formed on the at least one receiving member and the clutch member, and a third cam surface and a fourth cam surface constituting the other of the pressure-contact assisting cam and the back torque limiter cam are respectively formed on the pressure member and the clutch member.