PURPOSE: To provide a gas turbine combustion device and its assembling method in which a difference in thermal expansion between ceramic parts and metallic parts is accommodated and disassembling and assembling of the combustion device liner are easily carried out.

CONSTITUTION: An inner case 2 having an opening 14 is arranged with the opening 14 being directed upward. A ceramic combustion device liner 3 is inserted at the opening 14 and the opening 14 is provided with a lid member 5 for covering the opening 14 so as to press and hold the combustion device liner 3. A liner spring 6 is arranged between the lid member 5 and the combustion device liner 3, a case spring 7 is placed between the lid member 5 and the inner case 2, the inner case 2 containing such a lid member 5 is placed in a lateral direction and inserted into an outer case 1 having an opening 4 at its side part, the lid member 5 is fixed to the outer case 1 so as to be constructed.