To provide a developer storage container that stores developer, the developer storage container capable of maintaining stable charging performance of the developer, and an image forming apparatus including the developer storage container.SOLUTION: A toner container 30 comprises: a container body 37 that is formed with a toner discharge port 377; and a movable wall 32 that is movably provided in an internal space 37H of the container body 37. The movable wall 32 partitions the internal space 37H of the container body 37 into a first space 37S1 in which toner is stored and a second space 37S2 in which the toner is not stored, and moves in a first direction DA to convey the toner in the first space 37S1 toward the toner discharge port 377. The movable wall 32 includes a water vapor passage part 60 for causing water vapor in the first space 37S1 to pass through to the second space 37S2. The second space 37S2 of the container body 37 stores moisture absorbent K1 that absorbs the water vapor flowing into the second space 37S2 through the water vapor passage part 60.SELECTED DRAWING: Figure 16
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