noun
rider; horseman; jockey
Refers to a person who rides a horse, especially in contexts like horse racing or equestrianism. 騎手 is the most common term for a professional jockey.
彼は有名な騎手です。
He is a famous jockey.
騎手はレース前に馬の状態を確認した。
The jockey checked the horse's condition before the race.