PURPOSE: A streetlight pillar including a divided section assembly type lower light pillar is provided to improve resistance performance on falling moment and to prevent deformation by forming a reinforcement rib in an inner surface of the light pillar. CONSTITUTION: A streetlight pillar including a divided section assembly type lower light pillar comprises a lower light pillar (20) and an upper light pillar (40). The lower light pillar bends two metal plates including a same thickness and comprises a first division light pillar and a second division light pillar divided with a symmetric cross section. The first and second division light pillars comprise a light pillar reinforcement rib protruding to the inner side of a light pillar cross section on an end in which the first and second division light pillars are mutually crossed. A base plate and an upper cover plate are connected on the lower and upper surfaces of the lower light pillar, and a plurality of tendons is installed in the inside of the lower light pillar.
