PROBLEM TO BE SOLVED: To provide an agricultural work machine capable of reducing an operator's load.SOLUTION: An agricultural work machine includes a box-shaped tank body 33. The inside of the tank body 33 is partitioned by a partition wall 60 so that a fertilizer storage part 56 and a seed storage part 57 that are communicated with each other are formed. When performing fertilizing and seeding work, a first partition body 61 that causes the fertilizer storage part 56 and the seed storage part 57 to be in a non-communication state is used. When performing seeding work, a second partition body that enables the fertilizer storage part 56 to be used as part of the seed storage part 57.SELECTED DRAWING: Figure 3