| When The Fiendish Ghouls Night | |
| Cover: | When the Fiendish Ghouls Night cover.jpg |
| Type: | single |
| Artist: | Balzac |
| Released: | 1996 |
| Genre: | Horror punk |
| Length: | 2:25 (LP) 9:25 (CD) |
| Label: | Evilegend13 Records |
| Producer: | Balzac |
| Chronology: | Balzac |
| Prev Title: | Isolation From No.13 |
| Prev Year: | 1996 |
| Next Title: | Into The Light Of The 13 Dark Night |
| Next Year: | 1999 |
"When The Fiendish Ghouls Night" is the fourth single by the Japanese horror punk band Balzac. Released through their own label, Evilegend13 Records, it was sold in four different colors for the vinyl and sticker. In 2007, Balzac re-launched the single in CD format, with two bonus tracks.