A package delivery support system, a mobile unit, a non-transitory computer-readable storage medium storing a program, a package delivery support method, and a package delivery support method are disclosed. The package delivery support system includes: a mobile unit prepared in an area; and a management device configured to manage the mobile unit, the management device including circuitry configured to acquire 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 to supply 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.