The invention relates to a vibration generation apparatus used for brakers used in crushing and for roller compactors used in roller compaction. According to the invention, the vibration generation apparatus is suitable for braking work because a piston (3) reciprocates at high speed when a second switching means (30) is in a braker position (C). The vibration generation apparatus is suitable for roller compaction because the thrust of the piston is great and the number of reciprocal vibration of the piston per unit time, i.e., the frequency is high when the second switching means is in a roller compaction position (D).
