Police said Andrew Frank C Browning died after he jumped from a restaurant balcony of the Westin Grande Sukhumvit Hotel at about 10.15pm.
Police found a suicide note in the man’s pocket that was written to his children and detailed a health problem.
Staff of the restaurant said the man ordered a drink and then walked outside onto the balcony and disappeared.
A chair was found on the balcony, which was apparently used by the man to climb over the barrier.
The body was sent to the Chulalongkorn Hospital for an autopsy.
The British Embassy was informed.