Polyarylene sulfide and a manufacturing method thereof

A method is provided for producing a polyarylene sulfide by reacting a sulfidizing agent with a dihalogenated aromatic compound in an organic polar solvent in the presence of an alkali metal hydroxide, the method includes : carrying out the reaction in such a manner that the polymerization time in a temperature range of 230° C. to less than 245° C. (T1a) is not less than 30 minutes and less than 3.5 hours and that the conversion ratio of the dihalogenated aromatic compound at the end of the step is 70 to 98 mol. % and : carrying out the reaction in such a manner that the polymerization time in a temperature range of 245° C. to less than 280° C. (T2) is not less than 5 minutes and less than 1 hour.