An information-processing apparatus which can easily output an accessory content suitable for a user situation at a point of time in course of an operation to output a main content or before or after the operation is provided. The present invention includes a history-information generation section generates one or more pieces of correlation information each including at least one piece of information on the user utilizing the apparatus at a point of time the apparatus outputs an already used main content and in a time band including the point of time. A user-utilization accessory-content determination section determines an accessory content regarded as a content whose output operation in course of an operation to output a new main content or before or after the operation is considered to be suitable for the user on the basis of one or more pieces of correlation information stored in the correlation-information storage section and characteristics of one or more accessory contents stored in the accessory-content storage section, and outputs the determined accessory content. The present invention can be applied to an information-processing apparatus which can output a piece of music or a picture in course of operations to read and write a mail text.