Views: Display only first value from content field in a staff directory
I am assuming you are using Drupal 7 and Views 3. If that is true, then you could use the below - 

Quoting from the comment here - http://drupal.org/node/1024158#comment-5064416


  Under fields, when you add your image field, one of the configuration options is "Multiple Field Settings". Under that make sure you check the box for "Display all values in the same row". The last line under this will ask how many items you want to display. Type "1". You can also specify which number to start with if you like. Hope this helps.