A vehicle lamp device comprising: a left side unit to be disposed on a left side of a vehicle; and a right side unit to be disposed on a right side of the vehicle, wherein the left side unit includes a first control module that controls an operation of the left side unit, and a first accommodation chamber formed with a first opening through which the first control module is configured to be removably inserted into the first accommodation chamber, the first accommodation chamber accommodating the first control module, the right side unit includes a second control module that controls an operation of the right side unit, and a second accommodation chamber formed with a second opening through which the second control module is configured to be removably inserted into the second accommodation chamber, the second accommodation chamber accomodating the second control module, the first control module includes a housing having a contour shape in section perpendicular to a direction in which the first control module is removably inserted into the first accommodation chamber, the contour shape of the housing of the first control module is similar to a contour shape of the first opening, the second control module includes a housing having a contour shape in section perpendicular to a direction in which the second control module is removably inserted into the second accommodation chamber, the contour shape of the housing of the second control module is similar to a contour shape of the second opening, the first opening has, in a part of the contour shape thereof, a first right-left discrimination part that allows the first control module to enter the first accommodation chamber through the first opening and that restricts the second control module from entering the first accommodation chamber through the first opening, and the second opening has, in a part of the contour shape of thereof, a second right-left discrimination part that allows the second control module to enter the second accommodation chamber through the second opening and that restricts the first control module from entering the second accommodation chamber through the second opening. a left side unit to be disposed on a left side of a vehicle; and a right side unit to be disposed on a right side of the vehicle, wherein the left side unit includes a first control module that controls an operation of the left side unit, and a first accommodation chamber formed with a first opening through which the first control module is configured to be removably inserted into the first accommodation chamber, the first accommodation chamber accommodating the first control module, a first control module that controls an operation of the left side unit, and a first accommodation chamber formed with a first opening through which the first control module is configured to be removably inserted into the first accommodation chamber, the first accommodation chamber accommodating the first control module, the right side unit includes a second control module that controls an operation of the right side unit, and a second accommodation chamber formed with a second opening through which the second control module is configured to be removably inserted into the second accommodation chamber, the second accommodation chamber accomodating the second control module, a second control module that controls an operation of the right side unit, and a second accommodation chamber formed with a second opening through which the second control module is configured to be removably inserted into the second accommodation chamber, the second accommodation chamber accomodating the second control module, the first control module includes a housing having a contour shape in section perpendicular to a direction in which the first control module is removably inserted into the first accommodation chamber, the contour shape of the housing of the first control module is similar to a contour shape of the first opening, the second control module includes a housing having a contour shape in section perpendicular to a direction in which the second control module is removably inserted into the second accommodation chamber, the contour shape of the housing of the second control module is similar to a contour shape of the second opening, the first opening has, in a part of the contour shape thereof, a first right-left discrimination part that allows the first control module to enter the first accommodation chamber through the first opening and that restricts the second control module from entering the first accommodation chamber through the first opening, and the second opening has, in a part of the contour shape of thereof, a second right-left discrimination part that allows the second control module to enter the second accommodation chamber through the second opening and that restricts the first control module from entering the second accommodation chamber through the second opening.