Circuit board and display device including the same

A display device comprising:

• a display structure;
• and
• a circuit board connected to the display structure, the circuit board including:
• a base substrate;
• and
• a connection structure disposed on the base substrate, and connected to the base substrate by an accessing part, the connection structure including:
• a first connection electrode;
• a second connection electrode disposed in a same layer as the first connection electrode;
• a third connection electrode connected to the first lower connection electrode on the first connection electrode;
• and
• a fourth connection electrode connected to the second connection electrode on the second connection electrode, and disposed in a same layer as the third connection electrode.