PURPOSE: To obtain an isotropic fiber formed body for the fiber-reinforced composite member wherein short fibers are oriented at random by dispersing a tetrapod deformed fiber consisting of the core and acicular part in short fibers and forming the product.

CONSTITUTION: This fiber formed body 1 is formed with short fibers 2 such as whiskers and the deformed fibers 3 consisting of plural acicular parts 5 extending from the core 4. The deformed fibers 3 are dispersed to randomly orient the short fibers 2. The content of the deformed fiber 3 is preferably controlled to 0.3-55vol.%. The formed body 1 is obtained by dispersing a mixture of the short fiber 2 and the deformed fiber 3 in a specified ratio in water to obtain a slurry, injecting the slurry into the cavity of a forming die and press- forming the slurry with a presser punch. An isotropic fiber formed body 1 which can be thickened and lowered in density is obtained in this way.