Greek B Basket League
| Formerly | Greek National B Class Championship (1961–1986) |
|---|---|
| Sport | Basketball |
| Founded | 1961 |
| No. of teams | 45 |
| Country | Greece |
| Continent | Europe |
| Most recent champion(s) | Panerythraikos Giannena |
| Level on pyramid | 2nd-Tier (1961–1986) 3rd-Tier (1986–present) |
| Promotion to | Greek A2 Basket League |
| Relegation to | Greek C Basket League |
| Related competitions | Greek Cup |
| Official website | basket.gr |
The Greek B Basket League, or Greek B Basketball League (Greek: Ελληνική Β Μπασκετ Λιγκ), is a national basketball league in Greece. It is the 3rd-tier level of the basketball league system in Greece, and was founded in its current form in 1986. It is also known as National League 1. It is organized by the Hellenic Basketball Federation (E.O.K.).
Originally, the league began in 1961, as the Greek National B Class Championship, and it was the 2nd-tier level of Greek basketball until 1986, when it was replaced in that capacity by the Greek A2 Basket League.
The Greek B Basket League was originally held under a league format of two groups. From 1986 to 2012, the league was held under a one group league format. From 2013 to 2010, it was again held under a two group format. Under the current league format, a total of 45 clubs take part, which are separated into four groups that are based on geographical criteria.