The CMLL-Reina International Junior Championship (Campeonato Internacional Junior del CMLL-Reina in Spanish; CMLL-Reina Intānashonaru Junia Ōza (CMLL-Reinaインターナショナルジュニア王座) in Japanese) was a women's professional wrestling championship promoted by Consejo Mundial de Lucha Libre (CMLL) and Reina Joshi Puroresu.

The championship was created in September 2011 in the Universal Woman's Pro Wrestling Reina (UWWR) promotion, later gaining additional recognition from CMLL.

The tournament to crown the inaugural champion was featured by wrestlers from Consejo Mundial de Lucha Libre of Mexico and Universal Woman's Pro Wrestling Reina of Japan.

The final champion was Kaho Kobayashi, who defeated La Jarochita on September 15, 2017, in Tokyo to win the vacant title.

The tournament to crown the inaugural CMLL-Reina International Junior Champion ran from August 14 to September 10, 2011, and featured seven competitors.