A method for manufacturing a golf club head having a weight member includes: providing a weight block made of a metal material; disposing an isolation layer on the weight block to form the weight member; delivering a wax material to form a wax pattern covering a portion of the weight member; coating the weight member and the wax pattern with a shell mold plaster to form a shell mold covering the same; performing a de-waxing process which leaves a mold cavity in the shell mold; and casting a molten metal material in the mold cavity to form a club head main body, and removing the shell mold to form the golf club head having the weight member embedded in the club head main body. A golf club head manufactured by the method is also disclosed.