Clark County School District police said 24-year-old Dominique Joiner was arrested Monday on charges of sexual misconduct, kidnapping and child pornography.
Joiner is accused of having a relationship with a 17-year-old girl who was a student at Northwest Career and Technical Academy.
Officials said Joiner was hired as a bus driver for the fifth-largest school system in the country in October 2015 but is now suspended without pay.
Police said they acted on a tip from a parent and that they discovered the relationship was fueled by electronic communications and social media.
Police said Joiner is not available for media interviews.