A digital contents sales cyber mall system of a using condition sales type, wherein a contents sales apparatus which sells digital contents is connected to a contents purchasing apparatus, and
- in a contents sales method, when said digital contents are registered into said contents sales apparatus, digital contents using conditions comprising a server side access control to said digital contents which is executed on said contents sales apparatus side and a physical act restriction to control an access to said digital contents which is executed on said contents purchasing apparatus side that purchased said digital contents are defined.