The 2015 Busan Open was a professional tennis tournament played on hard courts. It was the fourteenth edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Busan, South Korea between 4 and 10 May 2015.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Lu Yen-hsun | 67 | 1 | ||
 Australia | Sam Groth | 85 | 2 | |
 Japan | Go Soeda | 87 | 3 | |
 Korea, Republic of | Chung Hyeon | 88 | 4 | |
 Israel | Dudi Sela | 90 | 5 | |
| Japan | Tatsuma Ito | 97 | 6 | |
 Slovakia | Lukáš Lacko | 99 | 7 | |
| Ryan Harrison | 122 | 8 |
The following players received wildcards into the singles main draw:
Hong Seong-chan Lim Yong-kyu Nam Ji-sung Oh Chan-yeongThe following players were given special exempt to gain entry into the singles main draw:
The following players received entry from the qualifying draw:
Jason Jung Kim Young-seokThe following player received entry from as a lucky loser:
| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 China | Gong Maoxin | Peng Hsien-yin | 210 | 1 | ||
| James Cerretani | Australia | Andrew Whittington | 258 | 2 | ||
| Australia | John-Patrick Smith | Australia | Jordan Thompson | 324 | 3 | |
 Thailand | Sanchai Ratiwatana | Thailand | Sonchat Ratiwatana | 327 | 4 |
The following pairs received wildcards into the singles main draw:
Chung Hyeon def. Lukáš Lacko 6–3, 6–1 Sanchai Ratiwatana / Sonchat Ratiwatana def. Nam Ji-sung / Song Min-kyu 7–6(7–2), 3–6, [10–7]