Masato Naitō (内藤 真人, Naitō Masato, born 31 July 1980 in Toyota, Aichi, Japan) is a retired Japanese hurdler.

He is the former national record holder for the 110 metres hurdles and 60 metres hurdles.

He also competed at the World Championships in 2001, 2003 and 2005 as well as the 2004 Olympic Games without reaching the final round.

His personal best time is 13.43 seconds in the 110 metres hurdles (Kumagaya 2008) and 7.75 seconds in the 60 metres hurdles (Valencia 2008).

This biographical article relating to Japanese athletics is a stub.