PROGRAMMABLE LOGIC DEVICE

To obtain a PLD that achieves high-speed configuration capable of dynamic configuration, consumes less power, and has a short startup time and a PLD that has a smaller number of transistors or a smaller circuit area than a PLD using an SRAM as a configuration memory, a plurality of logic elements arranged in an array and a switch for selecting electrical connection between the logic elements are provided. The switch includes a first transistor including a multilayer film including an oxide layer and an oxide semiconductor layer, a node that becomes floating when the first transistor is turned off, and a second transistor in which electrical continuity between a source and a drain is determined based on configuration data held at the node.