PACKAGE DELIVERY SUPPORT SYSTEM, PACKAGE DELIVERY SUPPORT METHOD, NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM STORING PROGRAM, AND MOBILE UNIT

A package delivery support system includes a mobile unit prepared in an area, and a sales server configured to acquire an intention of a user to purchase a product and transmit inquiry information as to whether an address or residence of a delivery destination is in an area in which the mobile unit is available, a delivery server configured to manage information regarding a package, and a management device configured to manage the mobile unit. The management device acquires at least one of a delivery request to deliver a package loaded on the mobile unit and a pickup request to pick up a package with the mobile unit, and supplies the mobile unit with an instruction for causing the mobile unit to move to a location specified by the at least one of the delivery request and the pickup request.