The Mahachai Line is a railway line in Thailand that connects the city of Mahachai in Samut Sakhon Province to the capital, Bangkok. It is part of the State Railway of Thailand and primarily serves commuter traffic, facilitating travel for local residents and workers. The line is approximately 30 kilometers long and features several stations along its route. It is known for its scenic views, as it runs through both urban and rural areas. The Mahachai Line is also notable for its connection to the Maeklong Railway, which is famous for its market that operates on the tracks.