A process cartridge comprising: a process unit including at least an image carrier and a developing device, which develops an image on the image carrier with toner, and being detachably attachable to an image forming apparatus; and a toner container detachably attached to the process unit and comprising: a container body to contain a toner, the container body being detachably attachable to a mounting portion including a linking member in the developing device, an outlet to discharge the toner contained in the container body; a shutter to open and close the outlet, wherein the shutter includes an engaging portion to engage with the linking member; and an operating member to move the shutter, wherein the operating member includes an engaging portion to engage with the linking member, wherein the operating member is disposed on a near side of the container body, and the shutter is disposed on a far side of the container body, wherein the far side is the front side of the container body in the direction of attachment to an image-forming apparatus main body and wherein the near side is the rear side opposite to the front side of the container body, wherein the linking member is made of an elongated flexible member, wherein one end of the linking member is engaged with the engaging portion of the operating member and the other end of the linking member is engaged with the engaging portion of the shutter, wherein the linking member is capable of performing a reciprocating linear movement, wherein in a state in which the container body is not mounted in the mounting portion, the shutter and the operating member are in a non-linked state with each other, and in a state in which the container body is mounted in the mounting portion, the shutter and the operating member become able to be linked to each other via the linking member. a process unit including at least an image carrier and a developing device, which develops an image on the image carrier with toner, and being detachably attachable to an image forming apparatus; and a toner container detachably attached to the process unit and comprising: a container body to contain a toner, the container body being detachably attachable to a mounting portion including a linking member in the developing device, an outlet to discharge the toner contained in the container body; a shutter to open and close the outlet, wherein the shutter includes an engaging portion to engage with the linking member; and an operating member to move the shutter, wherein the operating member includes an engaging portion to engage with the linking member, wherein a container body to contain a toner, the container body being detachably attachable to a mounting portion including a linking member in the developing device, an outlet to discharge the toner contained in the container body; a shutter to open and close the outlet, wherein the shutter includes an engaging portion to engage with the linking member; and an operating member to move the shutter, wherein the operating member includes an engaging portion to engage with the linking member, wherein the operating member is disposed on a near side of the container body, and the shutter is disposed on a far side of the container body, wherein the far side is the front side of the container body in the direction of attachment to an image-forming apparatus main body and wherein the near side is the rear side opposite to the front side of the container body, wherein the linking member is made of an elongated flexible member, wherein one end of the linking member is engaged with the engaging portion of the operating member and the other end of the linking member is engaged with the engaging portion of the shutter, wherein the linking member is capable of performing a reciprocating linear movement, wherein in a state in which the container body is not mounted in the mounting portion, the shutter and the operating member are in a non-linked state with each other, and in a state in which the container body is mounted in the mounting portion, the shutter and the operating member become able to be linked to each other via the linking member.