Both are classes of long-term memory. Declarative memory is the portion of long-term memory where information about facts and specific events is stored, involves structures in the temporal lobe (especially the hippocampus), and which is distinguished in terms of episodic and semantic memory. Procedural memory, which is governed by different brain systems, is a storage system for information concerning complex activities that have become highly automatized and are performed without much conscious effort, but which are acquired by a relatively slow process of learning (e.g., driving a car, riding a bicycle).
See Cortical lobes, Entorhinal cortex, Episodic event and semantic memory, Explicit (or declarative) and implicit (or non-declarative) memory, Hippocampus, Infantile amnesia, Memory, Mobile conjugate reinforcement, Reactivation, Sensory memory, short-term memory (STM) and long-term memory (LTM), Temporal lobe