Drupal View Deleted by mistake
There is no built-in way to restore a deleted view. Check if you have an old database dump somewhere (a regular backup, or maybe you created one when you put your site live). Depending on your hosting setup, your webhost may also have created backups of your server.

If that all fails, I'm afraid you will need to rebuild your view manually. While you're at it, consider upgrading your site to Drupal 7. Newer versions of Views make it really easy to export your view to code, so you can store your view in a version control system and never lose it again.