| Class: | Triennial |
| Category: | 10 |
| Year: | 1988 |
| Milan Triennial XVII | |
| Motto: | The Cities of the World and the Future of the Metropolis |
| Organized: | Marco Cavallotti (secretary general)[1] |
| Cnt: | 12 |
| Country: | Italy |
| City: | Milan |
| Coord: | 45.4722°N 9.1736°W |
| Open: | 21 September 1988 |
| Close: | 18 December 1988 |
| Prevexpo: | Milan Triennial XVI |
| Prevcity: | Milan |
| Nextexpo: | Milan Triennial XVIII |
| Nextcity: | Milan |
The Milan Triennial XVII was the Triennial in Milan sanctioned by the Bureau of International Expositions (BIE)[2] on the 5 June 1986.Its theme was The Cities of the World and the Future of the Metropolis. It was held at the Palazzo dell'Arte[3] and ran from 21 September 1988 to 18 December 1988.