Gen Tanasak attended the annual meetings from Aug 20-22 of the High Level Committee that both countries formed to ensure peace along their shared border.
He met Min Aung Hlaing, commander-in-chief of the Myanmar Armed Forces and the two men co-chaired the second meeting of the High Level Committee in Bagan.
At the meeting, both sides agreed to expand cooperation in narcotics suppression and the exchange of information on criminals.
They also agreed to promote their joint military role in disaster response along the border and develop free trade zones in their border areas to facilitate cargo transport.
As well, the Thai side will offer military training to Myanmar soldiers.
Gen Tanasak, who is also the deputy chief of the National Council for Peace and Order (NCPO), also paid a courtesy call on Myanmar President Thein Sein. The latter told him that the Myanmar government understood Thailand was on course to restoring peace and stability.
The president assured his guest that Thai-Myanmar relations on trade, investment and tourism remained intact as the situation in Thailand did not raise any concern.