| Date: | 19–25 October |
| Edition: | 1st |
| Category: | ATP Challenger Tour |
| Draw: | 32S/12D/11Q |
| Surface: | Hard, Indoor |
| Venue: | Brest Arena |
| Location: | Brest, France |
| Champs: | Ivan Dodig |
| Champd: | Wesley Koolhof / Matwé Middelkoop |
The 2015 Brest Challenger was a professional tennis tournament played on hard courts. It was the first edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place at the Brest Arena in Brest, France between 19 and 25 October 2015.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q | width=85 | Q2 | width=85 | Q1 |
| Singles | 125 | 75 | 45 | 25 | 10 | 0 | 5 | 0 | 0 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubles | 0 |
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q2 | width=85 | Q1 |
| Singles | €15,300 | €9,000 | €5,375 | €3,100 | €1,830 | €1,110 | €0 | €0 | ||
| Doubles * | €6,600 | €3,850 | €2,300 | €1,360 | €770 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 France | Benoît Paire | 25 | 1 | |
| France | Nicolas Mahut | 69 | 2 | |
 Ukraine | Illya Marchenko | 83 | 3 | |
 Australia | John-Patrick Smith | 112 | 4 | |
 Slovakia | Norbert Gombos | 123 | 5 | |
| Ivan Dodig | 127 | 6 | ||
 Uzbekistan | Farrukh Dustov | 134 | 7 | |
 Italy | Luca Vanni | 135 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry using a special exemption:
The following players received entry from the qualifying draw:
Maxime Tabatruong Sadio Doumbia
Yannik Reuter Illya Marchenko (left foot, first round) Maxime Teixeira (left abductor, second round)| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Wesley Koolhof | Matwé Middelkoop | 159 | 1 | |||
 United Kingdom | Ken Skupski | United Kingdom | Neal Skupski | 214 | 2 | |
 Serbia | Ilija Bozoljac | Antonio Šančić | 267 | 3 | ||
| James Cerretani |  Austria | Tristan-Samuel Weissborn | 322 | 4 |
The following pair received a wildcard into the doubles main draw:
Romain Jouan / Alexandre PenaudSee main article: 2015 Brest Challenger – Singles.
Benoît Paire, 7–5, 6–1.See main article: 2015 Brest Challenger – Doubles.
Ken Skupski / Neal Skupski, 3–6, 6–4, [10–6].