| Issue | #346 |
| Published | July 1966 |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Mort Weisinger |
| Notes | This issue includes the statement of ownership, management, and circulation. |
| Characters | Legion of Super-Heroes [Chameleon Boy; Superboy; Lightning Lad; Phantom Girl; Light Lass; Cosmic Boy; Karate Kid; Princess Projectra; Ferro Lad; Nemesis Kid] |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | George Klein |
| Letters | Ira Schnapp |
| Reprinted | in Legion of Super-Heroes Archives, The (DC, 1991 series) #5; in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #2 |
| Characters | Legion of Super-Heroes [Chameleon Boy; Phantom Girl; Lightning Lad; Karate Kid; Superboy; Cosmic Boy; Shrinking Violet; Light Lass; Princess Projectra; Nemesis Kid; Ferro Lad; Karate Kid]; Garlak |
| Synopsis | The Legion accepts 4 new members, but one appears to be a Khundish spy. |
| Genre | superhero |
| Script | Jim Shooter |
| Pencils | Jim Shooter |
| Inks | Sheldon Moldoff |
| Letters | Milton Snapinn |
| Editing | Mort Weisinger |
| Notes | Continues in next issue. |
| Reprinted | in Legion of Super-Heroes Archives, The (DC, 1991 series) #5; in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #2 |
| Characters | Cap |
| Synopsis | how to protect model car windows during painting |
| Script | Henry Boltinoff |
| Pencils | Henry Boltinoff |
| Inks | Henry Boltinoff |
| Letters | Henry Boltinoff |
| Characters | n/a |
| Synopsis | list of Legionnaires and their powers |
| Editing | Mort Weisinger |
| Notes | text feature |