We have developed a burner for a hydrogen combustion turbine and proposed two kinds of burners, in which the combustion region is separated from the mixing region and in the former H-2 and O-2 are burned in a slightly fuel-rich condition or a stoichiometric condition. We manufactured a small-scale, water-cooled model burner, made of oxygen-free copper, and with two pairs of transparent quartz windows for a flame observation. A coaxial type injector was employed, in which an inner tube (for oxygen) was set inside the recess of the outer tube (for hydrogen). The H-2-O-2 combustion characteristics were studied while changing such parameters as injection velocities, equivalence ratios, and swirl numbers adding to a O-2 flow. The stable combustion region ranged from (m) over dot(H2) = 0.3-1.5 g/s and from phi = 0.9-2.0. Then H-2,O-2 combustion characteristics in steam, N-2 and Ar were studied to get stable combustion conditions. As a result, we obtained the fundamental design materials for a hydrogen combustion turbine.