Robot therapy is expected to have psychological, physiological and social effects similar to animal therapy. The use of a therapeutic seal robot, Paro, in various facilities for the elderly is spreading around the world. However, caregivers use Paro freely, and the ways in which they use Paro differ among them. Therefore, the effects are influenced by their skills. A manual that shows effective ways to use Paro is needed. In this paper, such a manual that shows effective methods for robot therapy is developed and its effectiveness is evaluated in a preliminary study with one caregiver and two patients.