How to delete picture from my iphone?

Okay so i download whole bunch of photo to my iphone using itune on my computer and when i go to my phone to deleted certain picture they wouldnt let me cause there's no delete button is there any other way?

Okay first step that you have to do is connect your phone to iTunes. Secondly, create a new blank folder with no picture inside. If you want to delete all the pictures that you updated on your iPhone keep the folder blank or if you want to keep some pictures, copy those pictures in that particular folder. Next change the directory of the photos to the new folder you created in iPhones and sync. The pictures will be updated. Cheers!

Please go through the following steps for delete picture.

1. Connect the iPhone to your computer and launch iTunes
2. Go to Devices, then select your iPhone
3. Click on the Photos tab
4. Uncheck the Synch Photos option and click on Remove Photos
5. Click Apply. WARNING: This will remove all your photos!