Sharron Dobbins, from Arizona, is said to have used the device after the boy refused to wake up for Easter services.
She denies actually using the gun. Speaking to Fox 10, she said: "I did not touch him at all with the taser. I made the sound with the taser."
Police said two small bumps were found on the leg of her son.
She's been released on bail while the gun has been confiscated.
Stay up to date with the latest news stories from a Christian perspective. Sign up to our daily newsletter and receive more stories like this straight to your inbox every morning.