Multimedia contents retrieval system

A contents retrieval system of the invention includes: a contents database (15) constructed by a plurality of contents groups classified in accordance with classification criteria; a relation information setting unit (12) which sets relation information indicative of relation among contents included in the plurality of contents groups; a relation information database (17) for storing the relation information; and a control unit (14) which selects a plurality of contents having high relation to each other from the plurality of contents stored in the contents database (15) on the basis of the relation information in the relation information database (17) and simultaneously reproducing the selected plurality of contents.