fear of the number 13

Triskaidekaphobia[n 1] is the fear of the number thirteen. The number 13 has been linked to bad luck in the western superstition. Some buildings in the United States do not have a "13th floor."

An example of the phobia. The elevator does not have the "13th floor".

The term was first used by Isador Coriat in Abnormal Psychology.[1]

There is also a fear of Friday the 13th. This fear is called paraskevidekatriaphobia[n 2] or friggatriskaidekaphobia.[n 3]

Related pagesEdit


  1. From Greek words τρείς (treis; three), δέκα (deka; ten) and φόβος (fobos; fear).
  2. From Greek words παρασκευή (paraskevi; Friday) and δεκατρείς (dekatreis; thirteen).
  3. From Norse Goddess Frigg, from whom the word "Friday" came.


  1. "Abnormal Psychology" p. 319, published in 1910, Moffat, Yard and company (New York). Library of Congress Control No. 10011167.