Journey Drummer I Didn't Attack My Girlfriend!!!

2/1/2012 12:01 AM PST

Deen Castronovo
-- the current touring drummer for Journey -- has pled NOT GUILTY to attacking his girlfriend during a domestic incident in Oregon.

TMZ broke the story ... Deen was arrested over the weekend after a heated argument with his GF allegedly turned physical. Dude was hit with a laundry list of charges .... including assault, coercion, criminal mischief, interfering with making a report, and harassment.

This morning, Deen went in front of a judge and pled not guilty to everything.

A rep for Deen had previously told us the rocker believes "it was a misunderstanding that should not have been escalated to such a level in the first place."