Playing multimedia data with mobile devices is the trend in mobile computing. However, roaming around networks has the session continuity problem because of Internet routing fundamentals. We propose the session splice on multimedia communication for session continuity. It has following advantages: 1) operating without Mobile IP nor the triangular route problem, 2) leaving applications unchanged to keep the compatibility, 3) having no need to deploy external proxies, and 4) hiding movements from applications so applications or users do not need to rejoin sessions at the communication handoff. We implement the session splice in Windows 2000/XP and have experiments to show that the session splice with the negligible overhead can conserve home network bandwidth and maintain stable variation of packet round trip time.