A developing cartridge comprising: a casing (10; 10A; 10B; 10E; 10F) configured to accommodate developer therein; a storage medium (61; 61A; 61B; 61D; 61E; 61F) including an electric contact surface (611; 611A; 611B; 611D; 611E; 611F); an elastic member (73; 75A; 63B; 62E; 73F) extending in a first direction which crosses the electric contact surface (611; 611A; 611B; 611D; 611E; 611F), the elastic member (73; 75A; 63B; 62E; 73F) configured to be compressed or stretched in the first direction between a first state and a second state; a holder (62; 62A; 62B; 62D; 62E; 62F) including an outer surface (620; 620A) being positioned toward a side of the holder (62; 62A; 62B; 62D; 62E; 62F) in the first direction, the electric contact surface (611; 611A; 611B; 611D; 611E; 611F) being positioned at the outer surface (620; 620A), the electric contact surface (611; 611A; 611B; 611D; 611E; 611F) being movable between a first position and a second position in the first direction relative to the casing (10; 10A; 10B; 10E; 10F); wherein a length of the elastic member (73; 75A; 63B; 62E; 73F) in the first direction is greater in the first state than in the second state, wherein the electric contact surface (611; 611A; 611; 611D; 611E; 611F) is in the first position in a state where the elastic member (73; 75A; 63B; 62E; 73F) is in the first state, and wherein the electric contact surface (611; 611A; 611B; 611D; 611E; 611F) is in the second position in a state where the elastic member (73; 75A; 63B; 62E; 73F) is in the second state, the holder (62; 62F) includes a first end portion including the outer surface and a second end portion being separate from the first end portion in the first direction, and wherein the elastic member (73; 73F) is positioned between the first end portion and the second end portion and wherein a distance between the first end portion and the second end portion in the first direction is greater in the first state than in the second state, wherein the outer surface includes: a third surface (713a, 713b) positioned at both sides of the electric contact surface in a third direction which is different from the first direction respectively; wherein the third surface (713a, 713b) is farther from the elastic member in the first direction than the electric contact surface. a casing (10; 10A; 10B; 10E; 10F) configured to accommodate developer therein; a storage medium (61; 61A; 61B; 61D; 61E; 61F) including an electric contact surface (611; 611A; 611B; 611D; 611E; 611F); an elastic member (73; 75A; 63B; 62E; 73F) extending in a first direction which crosses the electric contact surface (611; 611A; 611B; 611D; 611E; 611F), the elastic member (73; 75A; 63B; 62E; 73F) configured to be compressed or stretched in the first direction between a first state and a second state; a holder (62; 62A; 62B; 62D; 62E; 62F) including an outer surface (620; 620A) being positioned toward a side of the holder (62; 62A; 62B; 62D; 62E; 62F) in the first direction, the electric contact surface (611; 611A; 611B; 611D; 611E; 611F) being positioned at the outer surface (620; 620A), the electric contact surface (611; 611A; 611B; 611D; 611E; 611F) being movable between a first position and a second position in the first direction relative to the casing (10; 10A; 10B; 10E; 10F); wherein a length of the elastic member (73; 75A; 63B; 62E; 73F) in the first direction is greater in the first state than in the second state, wherein the electric contact surface (611; 611A; 611; 611D; 611E; 611F) is in the first position in a state where the elastic member (73; 75A; 63B; 62E; 73F) is in the first state, and wherein the electric contact surface (611; 611A; 611B; 611D; 611E; 611F) is in the second position in a state where the elastic member (73; 75A; 63B; 62E; 73F) is in the second state, the holder (62; 62F) includes a first end portion including the outer surface and a second end portion being separate from the first end portion in the first direction, and wherein the elastic member (73; 73F) is positioned between the first end portion and the second end portion and wherein a distance between the first end portion and the second end portion in the first direction is greater in the first state than in the second state, wherein the outer surface includes: a third surface (713a, 713b) positioned at both sides of the electric contact surface in a third direction which is different from the first direction respectively; wherein the third surface (713a, 713b) is farther from the elastic member in the first direction than the electric contact surface.