| Document and Entity Information | Oct. 05, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001806310 |
| Document Type | 8-K |
| Document Period End Date | Oct. 5, 2021 |
| Entity Registrant Name | Taysha Gene Therapies, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39536 |
| Entity Tax Identification Number | 84-3199512 |
| Entity Address, Address Line One | 3000 Pegasus Park Drive |
| Entity Address, Address Line Two | Suite 1430 |
| Entity Address, City or Town | Dallas |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75247 |
| City Area Code | (214) |
| Local Phone Number | 612-0000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.00001 par value |
| Trading Symbol | TSHA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
