| Founded: | 1968 |
| Divisions: | Western (Nyugati) / Eastern (Keleti) |
| Teams: | 24 (in two groups) |
| Country: |  Hungary |
| Confed: | EHF |
| Champions: | Mosonmagyaróvári KC SE / Eszterházy KESC |
| Champ Season: | 2017-18 |
| Prem Season: | 2017-18 |
| Promotion: | Nemzeti Bajnokság I |
| Relegation: | Nemzeti Bajnokság II |
| Website: | Western Group: http://www.keziszovetseg.hu/v2h/013/002/p_002.asp?p_verseny_kod_al=277&p_verseny_kod_evad_al=6&p_kezilabda__evad_kod=6&p_fo_cim=NB%20I/B%20n%F5i%20feln%F5tt-Nyugat Eastern Group: http://www.keziszovetseg.hu/v2h/013/002/p_002.asp?p_verseny_kod_al=142&p_verseny_kod_evad_al=6&p_kezilabda__evad_kod=6&p_fo_cim=NB%20I/B%20n%F5i%20feln%F5tt-Kelet |
| Current: | 2018–19 Nemzeti Bajnokság I/B |
The Nemzeti Bajnokság I/B (en|National Championship I/B) is the second tier league for Hungarian women's handball clubs. It is administered by the Hungarian Handball Federation. The league is divided into two groups, a Western one and an Eastern one. Fourteen teams compete in each group and the group winners gain automatic promotion to the NB I.
The following teams participate in the 2018–19 season:
| Eastern Group | |
| Gödi SE | |
| Dorogi ESE | Hajdúnánás SK |
| Kecskeméti NKSE | |
| Kispest NKK-Endo Plus Se | |
| Levendula H. FKSE-Algyő | |
| NKK Balmazújváros | |
| Oxxo Energy Orosházi NKC | |
| PC Trade Szeged KKSE | |
| Szent István SE-OTP Bank | |
| Szentendrei NKE | |
| Szombathelyi KKA | Vasas SC |