The Type 15B was a luxury car introduced in 1904 by the French automaker Delahaye.
The Type 15B was introduced as the replacement for the innovative Type 10B. It had an engine with some innovative features. It was water cooled and featured removable heads. This engine had a 2.7 litre cubic capacity. The Type 15B was replaced in in 1911, with the arrival of the Delahaye Type 44.