Hans Christian Gram | |
|---|---|
 Hans Christian Gram by Hansen & Weller | |
| Born | Hans Christian Joachim Gram 13 September 1853 Copenhagen, Denmark |
| Died | 14 November 1938 (aged 85) Copenhagen, Denmark |
| Known for | Inventing the Gram stain |
| Scientific career | |
| Fields | Bacteriology |
| Doctoral advisor | Japetus Steenstrup |
Hans Christian Joachim Gram (13 September 1853 – 14 November 1938) was a Danish bacteriologist noted for his development of the Gram stain, still a standard technique to classify bacteria and make them more visible under a microscope.