Abstract: A high-silica content zeolite having a novel crystal structure, a zeolite membrane and manufacturing methods for these are provided, and the present invention relates to a zeolite having the chemical composition represented by [(Si36-xTy.O72).Mz] (wherein M is a cation of an alkali metal such as Li, Na, K or Rb, T represents Al, Ga, Fe and Ce as skeleton substituting elements, x satisfies 0?x?3.0, y satisfies 0?y?1.0 and z satisfies 0?z?3.0), and having a micropore formed of covalent bonds between Si and O atoms, with a specific diffraction peak at 2? in powder x-ray diffraction, together with a zeolite membrane and methods for manufacturing these.