| Bacteria | Bacteriophobia or Microbiophobia |
| Bald people | Peladophobia |
| Baldness (becoming) | Phalacrophobia |
| Beards | Pogonophobia |
| Beautiful women | Caligynephobia or Venustraphobia |
| Bed | Clinophobia |
| Bees | Apiphobia or melissophobia |
| Beggars | Hobophobia |
| Being afraid | Phobophobia |
| Being alone | Autophobia or monophobia |
| Being beaten | Rhabdophobia |
| Being bound | Merinthophobia |
| Being buried alive | Taphophobia |
| Being dirty | Automysophobia |
| Being egotistical | Autophobia |
| Being robbed | Harpaxophobia |
| Being scratched | Amychophobia |
| Being stared at | Scopophobia |
| Being touched | Chiraptophobia |
| Bicycles | Cyclophobia |
| Birds | Ornithophobia |
| Black colour | Melanophobia |
| Blindness | Scotomaphobia |
| Blood | Haemophobia |
| Blushing | Ereuthophobia |
| Body smells | Bromidrosiphobia |
| Bogeymen | Bogyphobia |
| Bolsheviks | Bolshephobia |
| Books | Bibliophobia |
| Bowel movements | Defecaloesiophobia |
| Brain disease | Meningitophobia |
| Bulls | Taurophobia |
| Burglars | Scelerophobia |
| Buried alive | Taphephobia |
