An interconnection structure includes a semiconductor chip, a mounting substrate on which the semiconductor chip is mounted, and a group of bonding wires provided to connect the semiconductor chip and the mounting substrate. The group of bonding wires includes: a first signal bonding wire contained in a first envelope and provided to propagate a signal; a first power supply bonding wire contained in the first envelope and applied with a first power supply voltage; and a second power supply bonding wire contained in a second envelope and applied with a second power supply voltage. One of the first envelope and the second envelope is arranged between the other of the first envelope and the second envelope and the mounting substrate. The second power supply bonding wire is arranged in a position in which electromagnetic coupling between the second power supply bonding wire and the first signal bonding wire is smaller than electromagnetic coupling between the second power supply bonding wire and the first power supply bonding wire.