Abstract: Provided are an apparatus and method for providing product-related information using a communication service. The method of providing product-related information using a communication service includes receiving product-related information from a terminal of a purchaser who has purchased a product, detecting information about a user who has an acquaintanceship with both the purchaser and a seller of the product by using the received product-related information, and transmitting a message for notifying the product-related information to a terminal corresponding to the detected user information.