We have studied the spectrum of the star HD 37129 which is a member of the Orion OB1 association. We have found that the helium abundance is normal and some iron peak elements are enhanced as well as manganese, phosphorus and mercury. The adopted effective temperature is 18750 K. We have compared the spectrum with a standard star, ι Her, and a "sn" peculiar star. We conclude that HD 37129 is a "sn" peculiar star with helium normal.