To support determination of a priority order of standardizing explicit knowledge to form a manual in the third step of knowledge management.

This knowledge management support device is provided with an information registering means for registering information, an evaluation registering means for registering evaluation for the information as information evaluation information, a classification registering means for defining classification, a retrieval condition registering means for registering retrieval conditions corresponding to the classification as classification retrieval condition information, retrieval similarity evaluation means for evaluating similarity by using the classification retrieval condition information for the information, and for preparing retrieval similarity evaluation information, a classification information-categorized evaluation means for calculating an evaluation value for each classification information from the information evaluation information and the retrieval similarity evaluation information, and for preparing classification information-categorized evaluation information, a classification-categorized evaluation means for totaling evaluation values for each field from the classification information-categorized evaluation information, and for preparing classification-categorized evaluation information, and a classification evaluation display means for displaying the classification-categorized evaluation information for each classification.