Provided is a business card management server that makes it possible to efficiently input information on business cards while protecting personal security, including: a business card information storage unit 101 in which business card information having a business card image and a business card identifier is stored; a piece storage unit 102 in which two or more pieces, each of which is an image in which only part of a business card image is recognizable, are stored for each business card image; a piece transmitting unit 104 that transmits two or more piece information each of which has one of two or more pieces corresponding to one business card image and further has a business card identifier, to one or more input terminals 20; a partial business card information receiving unit 105 that receives partial business card information having a business card identifier and a business card partial character string corresponding to a piece, from the input terminals 20; and a business card partial character string accumulating unit 110 that accumulates the business card partial character string, in the business card information storage unit 101, in association with the received business card identifier.