Shinnosuke (written: 真之介, 慎之介, 慎之助, 新之介, 新之助, 新乃輔, 槙之輔, 進之介, 伸之介 or 眞之亮) is a masculine Japanese given name. Notable people with the name include:

• Shinnosuke Abe (阿部 慎之助, born 1979), Japanese baseball player
• Shinnosuke Furumoto (古本 新乃輔, born 1969), Japanese voice actor
• Shinnosuke Hatanaka (畠中 槙之輔, born 1995), Japanese footballer
• Shinnosuke Honda (本田 慎之介, born 1990), Japanese footballer
• Ichikawa Shinnosuke (市川 新之助), a stage name taken on by a series of Kabuki actors of the Ichikawa family
• Shinnosuke Kakinaga (垣永 真之介, born 1991), Japanese rugby union player
• Katsura Shinnosuke (桂 伸乃介, 1952–2020), Japanese rakugoka
• Shinnosuke Mitsushima (満島 真之介, born 1989), Japanese actor
• Shinnosuke Nakatani (中谷 進之介, born 1996), Japanese footballer
• Nakayama Shinnosuke (中山 眞之亮, 1866–1914), the first Shinbashira of Tenrikyo
• Shinnosuke Ogasawara (小笠原 慎之介, born 1997), Japanese baseball player
• Shinnosuke Shigenobu (重信 慎之介, born 1993), Japanese baseball player
• Shinnosuke Tachibana (立花 慎之介, born 1978), Japanese voice actor
• Shinnosuke Tokuda (徳田 新之介, born 1995), Japanese handball player
• Shinnosuke Tsukue (机 伸之介, born 1989), Japanese squash player