Provided is a polymer latex production method that comprises an emulsificatoin step for obtaining an emulsion by emulsifying, in water and in the presence of a surfactant, a polymer solution obtainedby dissolving, in an organic solvent, a synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer that has a molecular weight distribution of 1.0-2.6. The polymer latex production method is characterized by use of a synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer that, when dissolved in the organic solvent so as to be made into a polymer solution that has aviscosity of 20,000 cps at 60 DEG C, has a solid content concentration of 10-60 weight%.