| Tsai Duei | |
| Native Name: | Chinese: 蔡堆 |
| Nationality: | Republic of China |
| Office1: | Minister of Transportation and Communications of the Republic of China |
| Term Start1: | 25 August 2006 |
| Term End1: | 20 May 2008 |
| Predecessor1: | Kuo Yao-chi |
| Successor1: | Mao Chi-kuo |
| Office2: | Political Deputy Minister of Transportation and Communications of the Republic of China |
| Minister2: | Kuo Yao-chi |
| Term Start2: | January 2006 |
| Term End2: | August 2006 |
| Office3: | Political Deputy Minister of Public Construction Commission of the Executive Yuan |
| Term Start3: | February 2005 |
| Term End3: | January 2006 |
| Office4: | Political Deputy Minister of Transportation and Communications of the Republic of China |
| Minister4: | Lin Ling-san |
| Term Start4: | February 2002 |
| Term End4: | February 2005 |
| Office5: | Administrative Deputy Minister of Transportation and Communications of the Republic of China |
| Minister5: | Yeh Chu-lan |
| Term Start5: | August 2000 |
| Term End5: | February 2002 |
| Birth Place: | Taichung, Taiwan |
| Alma Mater: | Taipei Institute of Technology National Taiwan Institute of Technology National Taiwan University |
Tsai Duei (; born 1 December 1947) is a Taiwanese politician who served as the Minister of Transportation and Communications.[1] [2]