The idea that Thailand should have another large port was first floated in 1948 when the Pibulsongkhram government concluded that the Bangkok Port could no longer satisfy the needs of Long-term economic development. Initially, it was planned to build a commercial port in Sriracha, but the project was later scrapped.

In 1961, the government commissioned NEDECO(Netherlands Engineering Consultants) to conduct a feasibility study on developing a new port in Sriracha NEDECO recommended that the new port could be constructed at Laem Chabang instead because the site was well sheltered, could easily be dredged ,and could have a spacious hinterland for the construction of port facilities. Still, the project was not implemented.

Between 1966 and 1969, the US had constructed port facilities at Sattahip for military use. In 1972, these facilities were transferred to the Thai government.

In1973, Louis Berger Co.,Ltd. Reported to the Ministry of Transport that the government should invest in expansion of the Sattahip Port rather than build a new deep sea port at Laem Chabang

However, the Ministry of trousgevert proposed that a new port was needed at Laem Chabang for reasons of safety, working efficiency and long-term expansion. On October 9, 1973 the cabinet approved this recommendation. Unfortunately, economic recession prevented the government from finding the needed funds to start construction. To relieve congestion at Bangkok Port, the government decided to develop Sattahip for the time being and made preparations for future development at Laem chabang.