Flotation of subbituminous coal has been investigated with special emphasis placed on the floatability of various petrogiaphic constituents. A nonpolar reagent such as kerosene, and the aliphatic and aromatic heteiopolar agents containing different polar groups (-OH, -COOH, -SO3H) have been used in the flotation experiments. The examined coal docs not float without flotation reagents; the use of kersene only was not enough to induce its floatability eithei. The extent to which the tested coal displayed some floatability depended on the kind of heteropolar reagent added. Microscopic examination has revealed that the flotation of petrographic constituents follows the order: inertinitc > vitrinite > exinite. Based on these results, the effect of the coal structure and its petrographic composition on floatability are discussed