2018 Busan Open

{{TennisEventInfo|2018|Busan Open|

| date=14–20 May

| edition=17th

| draw=32S / 16D

| surface=Hard

| location=Busan, South Korea

| champs={{flagicon|AUS}} Matthew Ebden

| champd={{flagicon|TPE}} Hsieh Cheng-peng / {{flagicon|INA}} Christopher Rungkat

| }}

The 2018 Busan Open was a professional tennis tournament played on hardcourts. It was the seventeenth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Busan, South Korea between 14 and 20 May 2018.

Singles main-draw entrants

=Seeds=

class="sortable wikitable"
width="70"| Country

! width="175"| Player

! Rank1

! Seed

{{flag|AUS}}

|Matthew Ebden

|83

|1

{{flag|IND}}

|Yuki Bhambri

|86

|2

{{flag|CAN}}

|Vasek Pospisil

|88

|3

{{flag|ISR}}

|Dudi Sela

|97

|4

{{flag|TPE}}

|Lu Yen-hsun

|111

|5

{{flagu|USA}}

|Mackenzie McDonald

|114

|6

{{flag|JPN}}

|Go Soeda

|149

|7

{{flag|TPE}}

|Jason Jung

|154

|8

* 1 Rankings as of May 7, 2018.

=Other entrants=

The following players received wildcards into the singles main draw:

The following player received entry into the singles main draw as a special exempt:

The following players received entry from the qualifying draw:

Champions

=Singles=

{{main|2018 Busan Open – Singles}}

=Doubles=

{{main|2018 Busan Open – Doubles}}