| Fool Metal Jack | |
| Type: | studio |
| Artist: | Os Mutantes |
| Cover: | File:Fool Metal Jack.jpg |
| Released: | April 30, 2013 |
| Genre: | Experimental rock, art rock, psychedelic rock, world music |
| Length: | 45:21 |
| Label: | Krian Music Group |
| Prev Title: | Haih Or Amortecedor |
| Prev Year: | 2009 |
| Next Title: | Zzyzx |
| Next Year: | 2020 |
Fool Metal Jack is the tenth studio album by the Brazilian rock band Os Mutantes. Released on April 30, 2013 by the US-based label Krian Music Group, it is the follow-up to Haih Or Amortecedor, Os Mutantes' first studio album in 35 years.[1]