1. A breast cancer pathological image diagnosis support system for supporting a diagnosis based on pathological images by using an HE-stained image and an IHC image as said pathological images of breast cancer, comprising: a matching unit which calculates a matching position of said HE-stained image and said IHC image; and a specifying unit which specifies a tumor area in said IHC image based on information of a tumor area in said HE-stained image and information of said matching position calculated by said matching unit.