A method of producing a high permeable composite reverse osmosis membrane which comprises forming a polyamide type skin layer on a porous support by the process comprising a step of coating a solution A containing a compound having at least two reactive amino groups on the porous support and a step of contacting a solution B containing a polyfunctional acid halide with the coated layer of the solution A, wherein the difference between a solubility parameter of the solution A and a solubility parameter of the solution B is from 7 to 15 (cal/cm.sup.3).sup.1/2.