| Cover | Sep. 27, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 27, 2021 |
| Entity File Number | 001-38793 |
| Entity Registrant Name | INMUNE BIO INC. |
| Entity Central Index Key | 0001711754 |
| Entity Tax Identification Number | 47-5205835 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 980 North Federal Highway |
| Entity Address, Address Line Two | Suite 110 |
| Entity Address, City or Town | Boca Raton |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33432 |
| City Area Code | 858 |
| Local Phone Number | 964 3720 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per shares |
| Trading Symbol | INMB |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
