PARKING SUPPORT DEVICE, PARKING SUPPORT METHOD, PARKING SUPPORT SYSTEM, STORAGE MEDIUM FOR STORING PARKING SUPPORT PROGRAM, AND PORTABLE TERMINAL DEVICE

A parking support device configured to support an automatic valet parking of a vehicle includes: an abnormality determiner configured to determine a presence or absence of an abnormality in an automatically driven vehicle when the automatically driven vehicle moves in a parking facility by automatic driving; and a notification instructor configured to issue, when determining an abnormality, a notification instruction for a portable terminal device held by a user of the automatically driven vehicle, notifying contents including (i) collection information indicating a collection position where the user should collect the automatically driven vehicle, and (ii) prompter information prompting that the user should go to the collection position.