Beast Tamer (勇者パーティーを追放されたビーストテイマー、最強種の猫耳少女と出会う, Yūsha Pātī o Tsuihou Sareta Bīsuto Teimā, Saikyōshu no Nekomimi Shōjo to Deau, "The Beast Tamer Who Was Exiled from His Party Meets a Cat Girl From the Strongest Race") is a Japanese light novel series written by Suzu Miyama and illustrated by Hotosoka.

Rein is a beast tamer who was expelled from the hero Arios' party who consider him too weak because he only has the ability to form contracts with animals.

By forming a contract with a member from one of the strongest races known as an "ultimate species", Rein obtains some of her powers, becoming much stronger.

Overcome with anger and frustration, Arios begins loathing Rein, neglecting his duties as a hero and focusing on revenge against him and his friends instead.

Written by Suzu Miyama began publication as a web novel on the novel publishing site Shōsetsuka ni Narō on June 11, 2018.