There is provided a product search system including a user interface through which a target product can be efficiently searched and specified from a number of products registered in a product master with high speed while reducing work load. In a representative embodiment of the present invention, there are provided a phrase analysis unit which acquires a character string of a product name of each of the products contained in a list of the products, divides the character string into phrases by a predetermined division character or a symbol to acquire words, and sets a word satisfying a predetermined condition in each of the words to a search word, and a search word processing unit that shows the search word to the user, narrows the products contained in the list down to products of which the product names contain a search word designated by the user, and outputs the narrowed products.