| Promotion tournaments between best Provincial teams to A RBG Men 1959. |
| Group West | pt | | 1. Balkan Botevgrad | 4 | | 2. Spartak Pleven | 3 | | 3. Botev Blagoevgrad | 2 |
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| Group South | pt | | 1. Petar Bonev s.Perustitsa | 6 | | 2. Dimitar Kanev Haskovo | 5 | | 3. Botev Stara Zagora | 4 | | 4. UAT Burgas | 3 |
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| Group North | pt | | 1. Cherno More Varna | 6 | | 2. Dunav Ruse | 5 | | 3. Panayot Volov Kolarovgr. | 4 | | 4. Etar Veliko Turnovo | 3 |
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| | | Winners of each Group were promoted to A RBG 1960. |
| Rk | Group West | pt | won | lst | pf | pa | p+- | ratio | | 1. | Balkan Botevgrad | 4 | 2 | 0 | 130: | 116 | +14 | 1.121 | | 2. | Spartak Pleven | 3 | 1 | 1 | 127: | 122 | +5 | 1.041 | | 3. | Botev Blagoevgrad | 2 | 0 | 2 | 110: | 129 | -19 | 0.853 |
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| Balkan Botevgrad was promoted to A RBG Men 1959. | | Matches played in Botevgrad. |
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| Team | Balk | Spar | Bote | | Balkan Botevgrad | ---- | 67:61 | 63:55 | | Spartak Pleven | | ---- | 66:55 | | Botev Blagoevgrad | | | ---- |
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| date | team 1 _________ | score | team 2 _________ | HT | | Fri 17.10.58 | Spartak Pleven | 66-55 | Botev Blagoevgrad | 31-28 | | Sat 18.10.58 | Balkan Botevgrad | 67-61 | Spartak Pleven | 32-26 | | Sun 19.10.58 | Balkan Botevgrad | 4-0 | Botev Blagoevgrad | int | | the match was interupted due to rain. | | Mon 20.10.58 | Balkan Botevgrad | 63-55 | Botev Blagoevgrad | 28-20 | | replay indoors in Sofia as Botev Blagoevgrad refused to stay in Botevgrad. |
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| Rk | Group South | pt | won | lst | pf | pa | p+- | ratio | | 1. | Petar Bonev s.Perustitsa | 6 | 3 | 0 | 133: | 117 | +16 | 1.137 | | 2. | Dimitar Kanev Haskovo | 5 | 2 | 1 | 140: | 116 | +24 | 1.207 | | 3. | Botev Stara Zagora | 4 | 1 | 2 | 148: | 144 | +4 | 1.028 | | 4. | UAT Burgas | 3 | 0 | 3 | 112: | 156 | -44 | 0.718 |
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| Petar Bonev s.Perustitsa was promoted to A RBG Men 1959. | | This was first and only village "selski" team promoted to Level I of Bulgarian basketball. |
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| Team | Peta | Dimi | Bote | UATB | | Petar Bonev s.Perustitsa | ---- | 47:42 | 61:54 | 25:21 | | Dimitar Kanev Haskovo | | ---- | 31:30 | 67:39 | | Botev Stara Zagora | | | ---- | 64:52 | | UAT Burgas | | | | ---- |
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| date | team 1 _________ | score | team 2 _________ | HT, FT | | played at Sportna ploshadka "Republika", Plovdiv. | | Fri 17.10.58 | Petar Bonev s.Perustitsa | 61-54 | Botev Stara Zagora | 29-18 | | Fri 17.10.58 | Dimitar Kanev Haskovo | 67-39 | UAT Burgas | 28-18 | | Sat 18.10.58 | Petar Bonev s.Perustitsa | 47-42 | Dimitar Kanev Haskovo | | | Sat 18.10.58 | Botev Stara Zagora | 64-52 | UAT Burgas | 30-27 | | Last 2 matches were postponed to Monday due to bad weather, but also played in not good (wet) conditions. | | Mon 20.10.58 | Petar Bonev s.Perustitsa | 25-21 | UAT Burgas | 14-9 | | Mon 20.10.58 | Dimitar Kanev Haskovo | 31-30aot | Botev Stara Zagora | 15-15, 28-28 |
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| Rk | Group C | pt | won | lst | pf | pa | p+- | ratio | | 1. | Cherno More Varna | 6 | 3 | 0 | 198: | 162 | +36 | 1.222 | | 2. | Lokomotiv Ruse | 5 | 2 | 1 | 196: | 195 | +1 | 1.005 | | 3. | Panayot Volov Kolarovgr. | 4 | 1 | 2 | 178: | 191 | -13 | 0.932 | | 4. | Etar Veliko Turnovo | 3 | 0 | 3 | 159: | 183 | -24 | 0.869 |
| Team | Cher | Loko | Pana | Etar | | Cherno More Varna | ---- | 68:49 | 76:62 | 54:51 | | Lokomotiv Ruse | | ---- | 74:60 | 73:67 | | Panayot Volov Kolarovgr. | | | ---- | 56:41 | | Etar Veliko Turnovo | | | | ---- |
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| Cherno More Varna was promoted to A RBG Men 1959. |
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| date | team 1 _________ | score | team 2 _________ | HT | | played in Ruse | | Fri 17.10.58 | Panayot Volov Kolarov | 56-41 | Etar Veliko Turnovo | 31-22 | | Fri 17.10.58 | Cherno More Varna | 68-49 | Lokomotiv Ruse | 37-22 | | Sat 18.10.58 | Lokomotiv Ruse | 74-60 | Panayot Volov Kolarov | | | Sat 18.10.58 | Cherno More Varna | 54-51 | Etar Veliko Turnovo | | | Sun 19.10.58 | Cherno More Varna | 76-62 | Panayot Volov Kolarov | 33-34 | | Sun 19.10.58 | Lokomotiv Ruse | 73-67 | Etar Veliko Turnovo | |
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