Ikoma Chikamasa (生駒 親正, 1526 – March 25, 1603) was a Japanese daimyō during the Azuchi-Momoyama and Edo periods around the turn of the 17th century.

Chikamasa was appointed one of the san-chūrō (three arbiters) by Toyotomi Hideyoshi, along with Horio Yoshiharu and Nakamura Kazuuji.

In Hideyoshi's last years, Ikoma Chikamasa, Nakamura Kazuuji, and Horio Yoshiharu were appointed to the position of chūrō under Toyotomi.

Chikamasa remained at Sanuki and sent his retainers, Onoki Shigekatsu, in his stead to attack Tanabe castle in Tango Province.

Because Kazumasa fought in Ieyasu's force, Ieyasu allowed Chikamasa to rule his existing domain after the battle, but Chikamasa took responsibility for fighting on the losing side by transferring the headship of the family to Kazumasa.