An order registration device includes: a processor configured to execute a process that includes: a number-of-people registration process for registering the number of customers related to one transaction; a product registration process for registering a product ordered by the customers; and a display control process for performing control such that a display unit displays a number-of-people button which is a button for inputting the number of orders with respect to the product registered in the product registration process, the same number as the number of customers registered in the number-of-people registration process being set as the number of orders by the number-of-people button.