A process cartridge (P) detachably mountable to a main assembly of an electrophotographic image forming apparatus , said process cartridge comprising: (i) a photosensitive member ; (ii) a photosensitive member frame rotatably supporting said photosensitive member; (iii) a developing roller for developing a latent image formed on said photosensitive member; (iv) a developing device frame rotatably supporting said developing roller and connected with said photosensitive member frame so as to be rotatable about a rotation axis (X) between a contacting position in which said developing roller is contacted with said photosensitive member and a spacing position in which said developing roller is spaced from said photosensitive member; and (v) a clutch including: (v-i) a first drive transmission member (37; 74; 474; 8074; 8174) rotatable about the rotation axis of said developing device frame; and (v-ii) a second drive transmission member (71; 571; 8071; 8171) rotatable about the rotation axis of said developing device frame and capable of connecting with said first drive transmission member and transmitting a rotational force to said developing roller, wherein said clutch is configured such that said first drive transmission member and said second drive transmission member are connected to each other when said developing device frame is in the contacting position so that said second drive transmission member can receive the rotational force from said first drive transmission member and transmit the rotational force to said developing roller, and said first drive transmission member and said second drive transmission are disconnected from each other when the second frame is in the spacing position so that said second drive transmission member does not receive the rotational force from said first drive transmission member. (i) a photosensitive member ; (ii) a photosensitive member frame rotatably supporting said photosensitive member; (iii) a developing roller for developing a latent image formed on said photosensitive member; (iv) a developing device frame rotatably supporting said developing roller and connected with said photosensitive member frame so as to be rotatable about a rotation axis (X) between a contacting position in which said developing roller is contacted with said photosensitive member and a spacing position in which said developing roller is spaced from said photosensitive member; and (v) a clutch including: (v-i) a first drive transmission member (37; 74; 474; 8074; 8174) rotatable about the rotation axis of said developing device frame; and (v-ii) a second drive transmission member (71; 571; 8071; 8171) rotatable about the rotation axis of said developing device frame and capable of connecting with said first drive transmission member and transmitting a rotational force to said developing roller, (v-i) a first drive transmission member (37; 74; 474; 8074; 8174) rotatable about the rotation axis of said developing device frame; and (v-ii) a second drive transmission member (71; 571; 8071; 8171) rotatable about the rotation axis of said developing device frame and capable of connecting with said first drive transmission member and transmitting a rotational force to said developing roller, <EOS>