| Psychedelic Polyhedron | |
| Type: | studio |
| Artist: | Mainliner |
| Cover: | Mainliner - Psychedelic Polyhedron.jpg |
| Released: | April 1997 |
| Recorded: | December 1996 at Studio K7, Tokyo, Japan |
| Genre: | Noise rock, psychedelic rock |
| Length: | 38:30 |
| Label: | Fractal |
| Producer: | Asahito Nanjo |
| Prev Title: | Mainliner Sonic |
| Prev Year: | 1997 |
| Next Title: | Imaginative Plain |
| Next Year: | 2001 |
Psychedelic Polyhedron is the second album by Mainliner, released in April 1997 by Fractal Records.