धनाग्र (ऐनोड / anode) उस विद्युताग्र (इलेक्ट्रोड) को कहते हैं जिससे होकर किसी वैद्युत युक्ति में विद्युत धारा प्रवेश करती है। विद्युत धारा की दिशा इलेक्ट्रॉन के प्रवाह की दिशा के विपरीत होती है।

An anode is an electrode of a polarized electrical device through which conventional current enters the device. This contrasts with a cathode, an electrode of the device through which conventional current leaves the device. A common mnemonic is ACID, for "anode current into device". The direction of conventional current in a circuit is opposite to the direction of electron flow, so electrons flow from the anode of a galvanic cell, into an outside or external circuit connected to the cell. For example, the end of a household battery marked with a "+" is the cathode.