| Cover | Feb. 06, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 06, 2023 |
| Current Fiscal Year End Date | --09-30 |
| Entity File Number | 333-191725 |
| Entity Registrant Name | REGEN BIOPHARMA, INC. |
| Entity Central Index Key | 0001589150 |
| Entity Tax Identification Number | 45-5192997 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 4700 Spring Street |
| Entity Address, Address Line Two | St 304 |
| Entity Address, City or Town | La Mesa |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 91942 |
| City Area Code | 619 |
| Local Phone Number | 722 5505 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
