The invention discloses a pressure chamber for a coal rock sample gas seepage test. The pressure chamber comprises a round steel cylinder, an annular pressure transmission sleeve, T-shaped end sockets, a PEEK sleeve, a conical steel sleeve, a right piston sleeve, a right first pressing sleeve, a right second pressing sleeve, a left first pressing sleeve and a left second pressing sleeve. A cylindrical coal rock sample cavity is formed between the annular pressure transmission sleeve and the two T-shaped end sockets; and an annular pressure applying cavity is formed between the annular pressuretransmission sleeve and the round steel cylinder. Two annular high-pressure liquid connectors are arranged on the side wall of the round steel cylinder; two axial high-pressure liquid connectors arearranged on the side wall of the right second pressing sleeve; and each of the two T-shaped end sockets is provided with a seepage high-pressure gas and resistivity tester PEEK insulation connector sharing connector. Therefore, the gas seepage conditions of the coal rock sample under underground real conditions of different pressures, different temperatures, underground waves and the like can be simulated truly, so that the test result has the higher practical guiding significance and the reliable guarantee is provided for safe mining of coal rock strata.