We present time‐resolved experimental measurements of the electron distribution functionf(v∥,v⊥,t) in a pulsed, partially ionized, electron cyclotron resonance (ECR)‐produced plasma. The discharge has some characteristics similar to those used in plasma processing applications. These properties include ECR production in a strong magnetic field and low electron temperature (Te<5 eV). In addition, electron‐neutral collisions play an important role. A novel analyzer is used to study the dependence off(v∥,v⊥,t) on velocities both parallel and perpendicular to the magnetic field. This information cannot be obtained with a simple Langmuir probe. The temporal evolution off(v∥,v⊥,t) is examined during plasma formation, with the source biased, with the source grounded and in the afterglow.