FIBROUS CELLULOSE COMPOSITE RESIN， METHOD FOR PRODUCING SAME， AND RESIN-REINFORCING MATERIAL

[Problem] To provide a fibrous cellulose composite resin having exceptional strength， a method for producing the same， and a resin-reinforcing material having an exceptional resin-reinforcing effect even if dried. [Solution] This fibrous cellulose composite resin includes a resin and a mixture of fibrous cellulose and a dispersant. Some or all of the fibrous cellulose includes fine fibers. The dispersant is a carboxylic acid and/or a glycerin. The average particle size of the mixture is 500 μm or less. To obtain the composite resin: the dispersant is mixed with a slurry of fibrous cellulose to form a mixture; the mixture is dried and crushed to form a powder， which is then kneaded with the resin; fine fibers are used as some or all of the fibrous cellulose; a carboxylic acid and/or a glycerin is used as the dispersant; and the powder is crushed to an average particle size of 500 μm or less.