The Sozina Tunnel (Cyrillic: Тунел Созина) is a road tunnel in Montenegro, and is a part of E65 European route. It is located north of town of Sutomore, and is designed to bypass the mountain range "Paštrovska Gora" that separates Montenegrin coast from Zeta plain and Skadar Lake basin .
The road tunnel "Sozina" is 4,189 m long, and is the longest and most modern vehicular tunnel in Montenegro. (However this is not the longest tunnel in Montenegro since train tunnel Sozina is 6km in length) It was opened on July 13, 2005, Montenegro's national day. It was built at the cost of 70 million euros. Since July 15, 2005, the toll is collected at the tunnel entrance. To this day, this toll tunnel is one of two parts of Montenegrin road network where toll is collected.