A printing apparatus includes storage means for storing print data including a password upon receipt of the print data, receiving means for receiving a print instruction for the stored print data from a user, authentication means capable of performing user authentication, and printing means for performing printing without causing an authenticated user to enter a password in a case where an owner of the print-instructed print data matches the authenticated user, and to perform printing in response to a match between a password received from a user and the password included in the print data in a case where the owner of the print-instructed print data differs from the authenticated user, or in a case where a print instruction is received without user authentication by the authentication means.