Photos is a built-in iPhone application that allows you to organise and view photos on your iPhone. The applications organises photos in photo albums, and you can access the individual photo albums from the photo library. The photo library opens automatically when you start the application. The Photos application also allows you to delete individual photos from the photo library. You select the photos' corresponding photo album and then choose the photo to be deleted.
Tap the "Photos" applications.
Select the photo album from the list of available photo albums in the photo library that contains the photos you want to delete.
Tap the individual photo that you want to delete.
Click the dustbin icon, in the bottom-right corner of the Photos application, to delete the photo.
Repeat the process to delete multiple photos.