A process for producing a DDR type zeolite membrane, comprising immersing a porous base material in a raw material solution containing 1-adamantanamine, silica and water and carrying out a hydrothermal synthesis of DDR type zeolite in the presence of DDR type zeolite seed crystal (seed crystal) to thereby form a DDR type zeolite membrane on the surface of the porous base material, wherein the 1-adamantanamine to silica content ratio (1-adamantanamine/silica) is in the range of 0.002 to 0.4 in terms of molar ratio while the water to silica content ratio (water/silica) is in the range of 10 to 500 in terms of molar ratio, and wherein the seed crystal has an average particle diameter of 300 nm or less. Thus, there is provided a process for producing a DDR type zeolite membrane in which a DDRtype zeolite membrane being uniform in membrane thickness, being thin and exhibiting high gas permeation rate can be stably produced.