An electronic device comprising: a base plate; and a plurality of modules (110a,110b,120,130) detachably attached to the base plate, wherein the modules (110a,110b,120,130) have a length in a depth direction between an end surface of a pullout end portion side of the module and a side of the module facing a front surface of the base plate, wherein the modules (110a,110b,120,130) comprise a terminal block module, wherein the terminal block module has an openable and closable door at the pullout end portion-side of the terminal block module, and the door has an attribute information display part configured to display attribute information of a device to be connected to the terminal block module, wherein a main body of the door is provided at the terminal block module such that it can be rotated about an angle in a first direction for the opening thereof and in the opposite direction for the closing, wherein the door of the terminal block module is configured such that, when the door is in the opened state where the main body is opened by about 90°, an opening side of the main body of the door protrudes further frontward than the end surface of the pullout end portion-side of an adjacent module, and wherein the attribute information display part is provided at the opening side of the main body of the door such that the attribute information display part can be rotated from a state where it is substantially flush with the main body of the door by rotation at the opening side about an angle in the first direction to be openable and closable in the opposite direction, characterized in that the length of the terminal block module in the depth direction is smaller than the length of the adjacent module in the depth direction, so that respective end surfaces on a pullout end portion-side form a step shape at a state where the respective modules are attached to the base plate, and the attribute information display part is provided at the opening side of the main body of the door such that it can be rotated to an angle beyond 180° in the first direction relative to the main body of the door. a base plate; and a plurality of modules (110a,110b,120,130) detachably attached to the base plate, wherein the modules (110a,110b,120,130) have a length in a depth direction between an end surface of a pullout end portion side of the module and a side of the module facing a front surface of the base plate, wherein the modules (110a,110b,120,130) comprise a terminal block module, wherein the terminal block module has an openable and closable door at the pullout end portion-side of the terminal block module, and the door has an attribute information display part configured to display attribute information of a device to be connected to the terminal block module, wherein a main body of the door is provided at the terminal block module such that it can be rotated about an angle in a first direction for the opening thereof and in the opposite direction for the closing, wherein the door of the terminal block module is configured such that, when the door is in the opened state where the main body is opened by about 90°, an opening side of the main body of the door protrudes further frontward than the end surface of the pullout end portion-side of an adjacent module, and wherein the attribute information display part is provided at the opening side of the main body of the door such that the attribute information display part can be rotated from a state where it is substantially flush with the main body of the door by rotation at the opening side about an angle in the first direction to be openable and closable in the opposite direction, characterized in that the length of the terminal block module in the depth direction is smaller than the length of the adjacent module in the depth direction, so that respective end surfaces on a pullout end portion-side form a step shape at a state where the respective modules are attached to the base plate, and the attribute information display part is provided at the opening side of the main body of the door such that it can be rotated to an angle beyond 180° in the first direction relative to the main body of the door.