Simple Answer

Yes, the bench press is a compound exercise as it is a multi-joint exercises as it uses both the elbow joint and the shoulder joint.

What Is A Compound Exercises?

A compound exercise is an exercise which uses multiple joints to perform the exercise. In this case the bench press requires both flexion and extension of the elbow and the shoulder in order to be performed.

What Is An Isolation Exercise?

An isolation exercise is an exercise which only requires one joint to be moved, a perfect example of this is the bicep curl. During the bicep curl it is only the elbow which is performing flexion and extension.

Which is More Effective: Compound vs Isolation Exercise?

Neither is more effective than the other, though both are more affective at achieving specific goals. If you are trying to isolate the bicep then isolation exercises will be the most effective whereas if you are trying to increase the strength of your upper body the bench press is going to be much more effective. Both compound and isolation exercises have their place in a well designed strength and conditioning programme.