I Am Under The Age Of 18. Can I Still Join Adsense?

Here is an excerpt from Adsense's own help site

Does AdSense have a minimum age requirement for participation?

As stated in the AdSense Terms and Conditions, publishers must be at least 18 years of age to participate in the AdSense program.

If you are not yet 18, you may have a parent or guardian submit an application using their name as the payee name. Please note that, should the application be approved, all payments will be made to the adult responsible for the site.