Purpose: The purpose of this study is to investigate the effects of visiting laughter therapy on depression and insomnia in the vulnerable elderly. Methods: A quasi-experimental nonequivalent control group pretest-posttest design was used for this study. The participants were 87 elderly who were registered in the Tailored Visiting Health Program of public health centers. Data were collected from September to November 2010. The experimental group received visiting laughter therapy froma visiting nurse who had taken laughter training provided by laughter therapy experts. The experimental group received 10~15 min of laughter therapy once a week for 8 weeks. The instruments included Geriatric Depression Scale and Insomnia Severity Index to measure depression and sleep problems before and after the laughter therapy. Results: The results showed that visiting laughter therapy was effective in decreasing depression and insomnia among the vulnerable elderly. Conclusion: These findings indicate that laughter therapy may be an effective nursing intervention to improve depression and insomnia Further studies would be needed to identify the difference of effects according to time, interval, or period of visiting laughter therapy and to evaluate the lasting effect of visiting laughter therapy.