Rust-Eater Bisco 4
| Volume Title | Rust-Eater Bisco 4 |
| Japanese Volume Title | 錆喰いビスコ4 |
| Light Novel | Sabikui Bisco |
| Publisher | ASCII Media Works |
| Light Novel Label | Dengeki Bunko |
| Author | Shinji Cobkubo |
| Illustrators | Akagishi K, mocha |
| Target Readership | Male |
| Volume | 4 |
| Release Date | July 10, 2019 |
| Pages | 376 |
| ISBN-10 | 4049124785 |
| ISBN-13 | 978-4049124781 |
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