In a self-propelled soil aeration device comprising a machine frame (18), a plurality of upwardly and downwardly movable piercing tools (2) which are arrangednext to each other transversely to the direction of travel and which define thewidth of a working path on the soil (2), at least two rear wheels (6) which runlaterally alongside the working path, and at least one front wheel (5) which isarranged in front of the piercing tools (2) as seen in the direction of travel, it isprovided that a supporting device extending transversely to the direction of travel is arranged in front of the piercing tools (2), as seen in the direction of travel,and is vertically adjustable with respect to the soil (3) such that in a working position, the rear wheels (6) are raised and the machine frame (18) is supported onthe supporting device and the at least one front wheel (5) so that neither thefront or rear wheels (6), nor the supporting device travel over the soil (3) already worked by the piercing tools (2), and that in a transport position, the supporting device is raised and the machine frame (18) is supported by the rearwheels (6) and the at least one front wheel (5).
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