| Yurii Yachniev | |
| Fullname: | Yurii Petrovych Yachniev |
| Birth Place: | Moscow |
| Position: | Midfielder |
| Years1: | 1960 |
| Years2: | 1961–1964 |
| Caps2: | 80+ |
| Goals2: | 13+ |
| Years3: | 1965–1966 |
| Clubs3: | CSKA Kyiv |
| Caps3: | 39+ |
| Goals3: | 3 |
| Years4: | 1967 |
| Caps4: | 6+ |
| Goals4: | 1 |
| Years5: | 1968 |
| Clubs5: | Torpedo Podolsk |
| Caps5: | 4+ |
Yurii Yachniev (uk|Юрій Петрович Ячнєв, ru|Юрий Петрович Ячнев; born 1940) is a retired Soviet professional footballer who played as a midfielder.
Yurii Yachniev during 1940 in Moscow. There he began playing football. Yachniev joined Dnipro Kremenchuk in 1960. In the final of Poltava Oblast Cup he scored the first goal to help his side win its first trophy. In January 1961 he moved to Kolhospnyk Poltava. He easily transitioned to professional football and became one of clubs leaders. He left Kolhospnyk after 1964 season ended. While performing his conscription service, he played for CSKA Kyiv. In August 1966 sports and technical commission of the Football Federation of the Soviet Union banned him from playing in any official matches. After his service was completed he rejoined Kolhospnyk. In 1986 he joined Torpedo from Podolsk.