| 2019 Santaizi ATP Challenger | |
|---|---|
| Date | 8–14 April |
| Edition | 6th |
| Draw | 48S / 16D |
| Surface | Hard (indoor) |
| Location | Taipei, Taiwan |
| Champions | |
| Singles | |
 Dennis Novak | |
| Doubles | |
 Sriram Balaji /  Jonathan Erlich | |
The 2019 Santaizi ATP Challenger was a professional tennis tournament played on indoor hard courts. It was the sixth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Taipei, Taiwan between 8 and 14 April.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 RSA | Lloyd Harris | 95 | 1 |
 RUS | Evgeny Donskoy | 123 | 2 |
 UKR | Sergiy Stakhovsky | 124 | 3 |
 SVK | Lukáš Lacko | 125 | 4 |
 GER | Matthias Bachinger | 128 | 5 |
 POL | Kamil Majchrzak | 130 | 6 |
 TPE | Jason Jung | 133 | 7 |
 CYP | Marcos Baghdatis | 137 | 8 |
| IND | Ramkumar Ramanathan | 140 | 9 |
 JPN | Tatsuma Ito | 146 | 10 |
| AUT | Dennis Novak | 155 | 11 |
 AUS | James Duckworth | 162 | 12 |
 KOR | Kwon Soon-woo | 165 | 13 |
| JPN | Hiroki Moriya | 178 | 14 |
| JPN | Yūichi Sugita | 187 | 15 |
 FRA | Maxime Janvier | 198 | 16 |
The following players received wildcards into the singles main draw:
Ray Ho Hsu Yu-hsiou Lee Kuan-yi Lo Chien-hsun Yu Cheng-yu The following player received entry into the singles main draw using a protected ranking:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Dennis Novak def. Sergiy Stakhovsky 6–2, 6–4. Sriram Balaji / Jonathan Erlich def. 
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