| Heart no Ace ga Detekonai | |
| Cover: | Candies - Heart no Ace ga Detekonai.jpg |
| Type: | single |
| Artist: | Candies |
| Album: | Haru Ichiban |
| Language: | Japanese |
| English Title: | Show the Ace of Hearts |
| B-Side: | Fuyu no Mado |
| Recorded: | 1975 |
| Length: | 3:06 |
| Label: | CBS Sony |
| Composer: | Kōichi Morita |
| Lyricist: | Machiko Ryū |
| Prev Title: | Sono Ki ni Sasenaide |
| Prev Year: | 1975 |
| Next Title: | Haru Ichiban |
| Next Year: | 1976 |
is the eighth single by Japanese music trio Candies. Written by Machiko Ryū and Kōichi Morita, the single was released on December 5, 1975.[1]
The song peaked at No. 11 on Oricon's singles chart and sold over 172,000 copies.[2]
All lyrics are written by Machiko Ryū; all music is written by Kōichi Morita; all music is arranged by Kōji Ryūzaki.