Cover - USD ($)	12 Months Ended
	Sep. 30, 2022	Dec. 21, 2022	Oct. 28, 2022
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2022
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
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	Suite 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
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	No
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float		$ 27,918,610
Entity Common Stock, Shares Outstanding			5,031,517,324
Auditor Name	BF Borgers CPA PC
Auditor Firm ID	5041
Auditor Location	Lakewood, CO