PROBLEM TO BE SOLVED: To provide an agricultural machine with roll wheels in which work bars provided in the roll wheels are easily attached or detached to/from a supporting member, and soil sticking to the work bars can be dropped well by a soil remover.SOLUTION: A tilling machine being an example of an agricultural machine includes: a working machine body for performing tillage and roll wheels 50 rotatably supported in the rear of the working machine body, and having two or more work bars 60 attached to two or more inner support members 57 and outer support members 55 disposed having predetermined intervals in the width direction of the working machine body. At least any of two or more work bars 60 is detachably attached to the two or more inner support members 57 and outer support members 55. The outer circumference of the inner support members 57 for detachably attaching the work bars 60 is provided with locking recesses 57a for detachably locking the work bars 60 while the side surfaces of the work bars 60 is projected more than the outer circumferential surface of the inner support members 57 in the radial direction outside in attaching the work bars 60.
