| Cover | Jan. 10, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 10, 2022 |
| Entity File Number | 0-13507 |
| Entity Registrant Name | SB FINANCIAL GROUP, INC |
| Entity Central Index Key | 0000767405 |
| Entity Tax Identification Number | 34-1395608 |
| Entity Incorporation, State or Country Code | OH |
| Entity Address, Address Line One | 401 Clinton Street |
| Entity Address, City or Town | Defiance |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 43512 |
| City Area Code | 419 |
| Local Phone Number | 783-8950 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Shares, No Par Value |
| Trading Symbol | SBFG |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
