Cavitation erosion produced by impingement of a cavitating jet was experimented using aluminum alloy specimens in tap water and petroleum-based hydraulic fluid.In this report, the effects of the configuration of nozzles, outlets of nozzles, and specimens are clarified. We use three types of nozzles, three types of configuration of outlets of nozzles and nine types specimens (oblique, convex, and concave). The results are as follows : 1) The larger the diameter of the nozzle, the larger the erosion-mass losses, the eroded regions, and the stand-off distance. In the case of larger diameter nozzles, we observe the cavitating jet in the downstream region by transmitted light-photographs. 2) The configuration of outlets of nozzles is not an essential erosion factor but it influences the mass losses.3) For both cases of tap water and petroleum-based hydraulic fluid, the peak erosion rate and the stand-off distance are correlated but independent of the configuration of outlets of nozzles. 4) On the experiment of the oblique specimens, in the case that the jet impinges perpendicularly to the surface of the specimens, the mass losses become the largest. 5) On the experiment involving conical convex and concave specimens, the mass losses become the largest in the case of slightly convex specimens, and they become the smallest in the case of the concave specimens. 6) These variation of mass losses can be explained by the degree of approach of bubbles to the specimen-surfaces due to centrifugal effect.