A tape feeder component check system that, in a component mounting line in which a plurality of tape feeders are set to a component mounter and a component supplied from each tape feeder is sucked by a suction nozzle and is mounted on a circuit board, is configured to determine whether a combination of the tape feeder and a tape reel including the component to be set to the tape feeder is correct without the tape feeder being set to the component mounter, comprising: a component identification information recording portion which is provided in the tape reel and in which identification information of the component to be supplied is recorded or stored; a database in which component data including the type, specifications, and product rank of the component and data for a product rank which can be combined with the product rank is recorded so as to be associated with the identification information, wherein the product rank is an index indicating the degree of variation in the characteristics of components of the same type and specifications due to manufacturing variations; identification information reading means that is configured to read the identification information of the component from the component identification information recording portion; and a production management computer that is configured to receive the identification information of the component transmitted from the identification information reading means, wherein the production management computer is configured to perform, without the tape feeder being set to the component mounter, a combination determination process of reading the component data corresponding to the identification information of the component read by the identification information reading means from the database and of determining whether the product rank of the component can be combined with the product rank of another component to be mounted on the circuit board, and to notify the operator of the determination result when it is determined that the product ranks cannot be combined with each other. a component identification information recording portion which is provided in the tape reel and in which identification information of the component to be supplied is recorded or stored; a database in which component data including the type, specifications, and product rank of the component and data for a product rank which can be combined with the product rank is recorded so as to be associated with the identification information, wherein the product rank is an index indicating the degree of variation in the characteristics of components of the same type and specifications due to manufacturing variations; identification information reading means that is configured to read the identification information of the component from the component identification information recording portion; and a production management computer that is configured to receive the identification information of the component transmitted from the identification information reading means, wherein the production management computer is configured to perform, without the tape feeder being set to the component mounter, a combination determination process of reading the component data corresponding to the identification information of the component read by the identification information reading means from the database and of determining whether the product rank of the component can be combined with the product rank of another component to be mounted on the circuit board, and to notify the operator of the determination result when it is determined that the product ranks cannot be combined with each other.