A product design device includes a product database, a design feature amount acquisition unit, a search unit that searches for a first product having a first design feature amount similar to a second design feature amount from a product database and acquires information on a sales record of the first product that has been searched for, and an output unit that statistically processes product attribute information including at least one of the first design feature amount of the first product that has been searched for or the information on the sales record of the first product that has been searched for, and outputs the statistically processed product attribute information.