To provide a compressor having reduced noises without leaking directly to the outside when sucking material air to produce compressed air, and to provide an oxygen enricher.

The compressor 10 includes a case part 23, a driving motor 11 provided on the case part 23 and having an output shaft 15, head parts 21, 22 to be operated with the rotation of the output shaft 15 of the driving motor 11 for sucking and compressing the material air 70 to produce the compressed air 71, and a material air trapping part 90 provided on the output shaft 15 for trapping the material air 70 with the rotation of the output shaft 15 to supply the material air to the side of the head parts 21, 22. Herein, a cover member is mounted on the side of the case part for covering the material air trapping part on the output shaft. The cover member 92 has a partition part 94 formed around the material air trapping mart 90 on the output shaft 15.