A toner cartridge comprising: a toner receptacle (101Y, 101M, 101C, 101K) configured to accommodate toner, the toner receptacle (101Y, 101M, 101C, 101K) having an opening; and a receptacle holding member (102Y, 102M, 102C, 102K) engaged with the toner receptacle (101Y, 101M, 101C, 101K) such that the receptacle holding member (102Y, 102M, 102C, 102K) covers or closes the opening and holds the toner receptacle (101Y, 101M, 101C, 101K) rotatably, and as the toner receptacle (101Y, 101M, 101C, 101K) rotates, toner in the toner receptacle (101Y, 101M, 101C, 101K) passes to the receptacle holding member (102Y, 102M, 102C, 102K) via the opening, wherein the receptacle holding member (102Y, 102M, 102C, 102K) includes a toner storage section (106Y, 106M, 106C, 106K) in which the toner is stored before being discharged out of the receptacle holding member (102Y, 102M, 102C, 102K); a connecting passage (114Y, 114M, 114C, 114K); and an insertion passage (115Y, 115M, 115C, 115K) extends along a direction parallel to the direction of the axis of rotation of the toner receptacle (101Y, 101M, 101C, 101K), and is configured to be connected to the connecting passage (114Y, 114M, 114C, 114K), characterized in that: the connecting passage (114Y, 114M, 114C, 114K) is configured to connect the insertion passage (115Y, 115M, 115C, 115K) and the toner storage section (106Y, 106M, 106C, 106K) of the receptacle holding member (102Y, 102M, 102C, 102K), wherein the insertion passage (115Y, 115M, 115C, 115K), the connecting passage (114Y, 114M, 114C, 114K) and the toner storage section (106Y, 106M, 106C, 106K) are configured to be positioned in a line in this order in a direction orthogonal to the direction of the axis of rotation of the toner receptacle (101Y, 101M, 101C, 101K), wherein the connecting passage (114Y, 114M, 114C, 114K) has a conical shape forming a taper that tapers from the toner storage section (106Y, 106M, 106C, 106K) to the insertion passage (115Y, 115M, 115C, 115K). a toner receptacle (101Y, 101M, 101C, 101K) configured to accommodate toner, the toner receptacle (101Y, 101M, 101C, 101K) having an opening; and a receptacle holding member (102Y, 102M, 102C, 102K) engaged with the toner receptacle (101Y, 101M, 101C, 101K) such that the receptacle holding member (102Y, 102M, 102C, 102K) covers or closes the opening and holds the toner receptacle (101Y, 101M, 101C, 101K) rotatably, and as the toner receptacle (101Y, 101M, 101C, 101K) rotates, toner in the toner receptacle (101Y, 101M, 101C, 101K) passes to the receptacle holding member (102Y, 102M, 102C, 102K) via the opening, wherein the receptacle holding member (102Y, 102M, 102C, 102K) includes a toner storage section (106Y, 106M, 106C, 106K) in which the toner is stored before being discharged out of the receptacle holding member (102Y, 102M, 102C, 102K); a connecting passage (114Y, 114M, 114C, 114K); and an insertion passage (115Y, 115M, 115C, 115K) extends along a direction parallel to the direction of the axis of rotation of the toner receptacle (101Y, 101M, 101C, 101K), and is configured to be connected to the connecting passage (114Y, 114M, 114C, 114K), characterized in that: the connecting passage (114Y, 114M, 114C, 114K) is configured to connect the insertion passage (115Y, 115M, 115C, 115K) and the toner storage section (106Y, 106M, 106C, 106K) of the receptacle holding member (102Y, 102M, 102C, 102K), wherein the insertion passage (115Y, 115M, 115C, 115K), the connecting passage (114Y, 114M, 114C, 114K) and the toner storage section (106Y, 106M, 106C, 106K) are configured to be positioned in a line in this order in a direction orthogonal to the direction of the axis of rotation of the toner receptacle (101Y, 101M, 101C, 101K), wherein the connecting passage (114Y, 114M, 114C, 114K) has a conical shape forming a taper that tapers from the toner storage section (106Y, 106M, 106C, 106K) to the insertion passage (115Y, 115M, 115C, 115K). the connecting passage (114Y, 114M, 114C, 114K) is configured to connect the insertion passage (115Y, 115M, 115C, 115K) and the toner storage section (106Y, 106M, 106C, 106K) of the receptacle holding member (102Y, 102M, 102C, 102K), wherein the insertion passage (115Y, 115M, 115C, 115K), the connecting passage (114Y, 114M, 114C, 114K) and the toner storage section (106Y, 106M, 106C, 106K) are configured to be positioned in a line in this order in a direction orthogonal to the direction of the axis of rotation of the toner receptacle (101Y, 101M, 101C, 101K), wherein the connecting passage (114Y, 114M, 114C, 114K) has a conical shape forming a taper that tapers from the toner storage section (106Y, 106M, 106C, 106K) to the insertion passage (115Y, 115M, 115C, 115K).