The relations between the two countries have been largely influenced by the contribution of Bangladesh forces as part of United Nations Peace Keeping mission in Sierra Leone.

In 2003, then president of Sierra Leone Ahmad Tejan Kabbah paid an official visit to Bangladesh.

[2] The peacekeepers have also made vital contributions after the civil war in building important infrastructure.

[5][6] Sierra Leone has sought Bangladeshi investments especially in garment, textile and agricultural sectors.

There have been major investments in Sierra Leone by Bangladeshi companies in the agricultural sector, the most notable being Bangladesh based Bengal Agro Limited which has invested $50 million and has set up a rubber processing plant in Sierra Leone which is the first of its kind in West Africa.