COSMOS 345
| Launched | 19 May 1970 |
| Flight ended | 27 May 1970 |
| Status | Decayed |
| Launch site | Tyuratam Missile and Space Center, Kazakhstan (Also known as Baikonur Cosmodrome) |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 4403 |
| COSPAR ID | 1970-039A |
| Observing |
Launched alongside
SL-3 R/B