The Himekami granitic mass, Kitakami mountainland, consists of various rock facies. From the field and microscopic observations, this body is divided into five rock types, namely the Himekami A, B, C and the Ohira A and B. The Himekami types are more leucocratic than the Ohira types and the boundary between the Himekami and the Ohira types is rather sharp and is easily recognized in the field. The results of modal analyses on twenty-three rocks of these five types are given. If they are derived from a common magma, these data indicate that the Himekami and the Ohira types have slightly different cooling histories. In thedistribution area of the Ohira types, characteristic alkali gabbros and biotite clinopyroxenites are encountered at small outcrops. Chemical compositions of seven representative rocks and two micas are given. The several features of the Himekami granitic body resemble those of the Ichinohe plutonic complex, though some differences are also found between these two bodies.