Peter Frampton -- Show Me the Way ... to Divorce

6/23/2011 4:07 PM PDT

Peter Frampton Files For Divorce From Wife Christina Elfers

Rock legend Peter Frampton has filed for divorce from his wife of 15 years, Christina Elfers ... TMZ has learned.

Frampton filed the divorce papers in L.A. County Superior Court citing irreconcilable differences.

Frampton and Elfers have one minor daughter together. Frampton is asking for joint legal custody ... but he wants primary physical custody to be awarded to Christina.

This is Frampton's third divorce ... the guitar hero broke off his marriage to Mary Lovett in 1973 and split from Barbara Gold in 1993.