To provide a kiln tool excellent in processability, which has good processability and processing precision, and has high durability in high temperature/strong oxidizing and corrosive environment.

A kiln tool excellent in processability is formed by using a fiber composite material provided with a yarn aggregate 6 and a matrix. The yarn aggregate 6 is formed by three-dimensionally combining and integrating a carbon fiber bundle 3, and yarns 2A and 2B containing a carbon component excluding the carbon fiber so that they do not separate each other. The matrix is composed of Si-SiC materials 4A, 4B, 5A and 5B, wherein the Si-SiC materials are filled between the yarns 2A and 2B mutually adjacent in the yarn aggregate 6.