This study, which formulated interaction training of seniors using TREASURE Talk Coaching Model and conducted a workshop, aimed to identify its interaction-promoting effect. Research questions established for this purpose were meant to formulate einteraction training of seniors using TREASURE Talk Coaching Model and verify the effect of the interaction training. In an attempt to formulate interaction training of seniors using TREASURE Talk Coaching Model, the study selected things enjoyable to play following the validity analysis by experts, made scripts as well as videos. And it also arranged the test group and control group each 17 persons out of totally 34 seniors, and using the CICAIO (Coaching Inventory Child-Adult Interaction Through Observation), it conducted pre-tests among the two groups. After conducting interaction training among the test group, the study identified the excessive practise of TREASURE Time for 21 days through colleague coaching. And two weeks after the end of TREASURE Time, it conducted a post-test using CICAIO scales in a same way as the pre-test. The study verified the effects among the test group and control group through independent samples t-test, and compared the pre-test and post-test of the test group using paired samples t-test. As a result, the study found all of them were statistically significant and verified that interaction training using TREASURE Talk Coaching Model had an effect on interaction of seniors.