| Document and Entity Information | Dec. 20, 2021 |
| Document And Entity Information [Line Items] | |
| Entity Address, Country | FR |
| Entity Tax Identification Number | 00-0000000 |
| Amendment Flag | false |
| Entity Central Index Key | 0001613780 |
| Document Type | 8-K |
| Document Period End Date | Dec. 20, 2021 |
| Entity Registrant Name | DBV Technologies S.A. |
| Entity Incorporation State Country Code | I0 |
| Entity File Number | 001-36697 |
| Entity Address, Address Line One | 177-181 avenue Pierre Brossolette |
| Entity Address, Postal Zip Code | 92120 |
| Entity Address, City or Town | Montrouge |
| City Area Code | 33 |
| Local Phone Number | 1 55 42 78 78 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security Exchange Name | NASDAQ |
| Security 12b Title | Ordinary shares, nominal value €0.10 per share |
| Adr [Member] | |
| Document And Entity Information [Line Items] | |
| Security Exchange Name | NASDAQ |
| Security 12b Title | American Depositary Shares, each representing one- half of one ordinary share, nominal value €0.10 per share |
| Trading Symbol | DBVT |
