We present a detailed chemical abundance study of three red horizontal branch and two red giant branch stars in the metal-rich globular cluster NGC 6637 ( M69 ) .
The value of [ Fe/H ] derived from LTE calculations is - 0.77 \pm 0.02 dex .
We also discuss the anticorrelation between oxygen and sodium abundances in the program stars and compare the [ Si/Ti ] ratio of NGC 6637 with those of other globular clusters .