Method for producing thermoplastic resin

The purpose of the present invention is to provide a method for producing a thermoplastic resin having good hue, excellent molding fluidity, and having few gel byproducts. This method involves producing the thermoplastic resin by reacting (i) a dihydroxy component with (ii) a carbonic acid diester component, a dicarboxylic acid component or a mixture thereof. The method for producing the thermoplastic resin is characterized in that: 9,9-Bis(4-(2-hydroxyethoxy)phenyl)fluorene is used as the dihydroxy component, the purity of which is at least 98%; the content of a polymer (1) represented by formula (1) is less than 0.5% but not less than 0.01%; the content of a polymer (2) represented by formula (2) is less than 0.5% but not less than 0.01%; and the total content of polymer (1) and polymer (2) is less than 1.0% but not less than 0.02%.