PROBLEM TO BE SOLVED: To provide a rotary tilling device capable of easily checking an oil amount of a bearing part on a support frame side of a tillage rotor, performing oil supply work easily, and securing the lubrication oil amount of the bearing part sufficiently.SOLUTION: A rotary tilling device includes a first oil storage part 74 which is a lubricating oil storage part for a bearing part 7 in the lower end part of a support frame 3, and a second oil storage part 75 separately from the first oil storage part 74. The first oil storage part 74 and the second oil storage part 75 are communicated with each other by a pipe material 76. The second oil storage part 75 is provided with an oil supply port 751, in which the oil amount can be checked.
