Polyhydroxyalkanoate resin composition, molded body of the same, and film or sheet of the same

A polyhydroxyalkanoate resin composition, comprising:

• a polyhydroxyalkanoate resin component, wherein in differential scanning calorimetry of the polyhydroxyalkanoate resin composition, a highest melting peak temperature is at least 130° C., and a total crystalline melting enthalpy calculated from all melting peaks is from 20 to 65 J/g, wherein the polyhydroxyalkanoate resin component is a mixture of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (A) comprising from 1 mol % to 6 mol % of 3-hydroxyhexanoate structural units and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) or poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (B) comprising from 24 mol % to 45 mol % of 3-hydroxyhexanoate structural units or 4-hydroxybutyrate structural units, and in the mixture, a proportion of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (A) is from 35% by weight to 75.8% by weight, and a proportion of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) or poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (B) is from 24.2% by weight to 65% by weights wherein an average content ratio of 3-hydroxybutyrate units and other monomer units, 3-hydroxybutyrate units/other monomer units, in the total polyhydroxyalkanoate resin component is from 89/11 to 82/18 mol %/mol %, and wherein the Elmendorf tearing resistance is from 5.1 N/mm to 52.0 N/mm.