The bands said at their concert in suburban Denver on Wednesday night that they would donate $100,000 to the Aurora Victim Relief Fund.
The fund was set up to help victims and families who were hurt when a man opened fire July 20 at a midnight showing of the new Batman movie in Aurora. Twelve people were killed, and 58 were injured.
Nikki Sixx of Mötley Crüe and Paul Stanley of Kiss said in a written statement that they hope their gesture will encourage others to give.