A speed limit display device for a vehicle, comprising: an indicator mountable in the vehicle, the indicator configured to display information related to a speed limit of a road on which the vehicle is traveling; an image obtaining device configured to capture an image of a landscape in a direction in which the vehicle is traveling and obtain image data of the landscape; and a processing portion configured to detect a traffic sign (51, 52) in the landscape by determining whether a traffic sign (51, 52) indicating a speed limit is included in the captured image based on the data of the captured image, to detect the speed limit (Vst_new) indicated on the traffic sign (51, 52), and to display the speed limit on the indicator, wherein the processing portion is configured to determine whether a predetermined condition is satisfied when the traffic sign (51, 52) is detected based on the image data, the predetermined condition including a condition that a distance (ΔDst) between the vehicle and the traffic sign (51, 52) be less than a predetermined distance (ΔDth), wherein the predetermined distance (ΔDth) is set based on the detected speed limit (Vst_new); the processing portion is configured to display the detected speed limit (Vst_new) on the indicator when the predetermined condition is satisfied; and the processing portion is configured to not display the detected speed limit (Vst_new) on the indicator when the predetermined condition is not satisfied, wherein when the detected speed limit (Vst_new) is high, the predetermined distance (ΔDth) is set to a large value, and when the detected speed limit (Vst_new) is low, the predetermined distance (ΔDth) is set to a small value. an indicator mountable in the vehicle, the indicator configured to display information related to a speed limit of a road on which the vehicle is traveling; an image obtaining device configured to capture an image of a landscape in a direction in which the vehicle is traveling and obtain image data of the landscape; and a processing portion configured to detect a traffic sign (51, 52) in the landscape by determining whether a traffic sign (51, 52) indicating a speed limit is included in the captured image based on the data of the captured image, to detect the speed limit (Vst_new) indicated on the traffic sign (51, 52), and to display the speed limit on the indicator, wherein the processing portion is configured to determine whether a predetermined condition is satisfied when the traffic sign (51, 52) is detected based on the image data, the predetermined condition including a condition that a distance (ΔDst) between the vehicle and the traffic sign (51, 52) be less than a predetermined distance (ΔDth), wherein the predetermined distance (ΔDth) is set based on the detected speed limit (Vst_new); the processing portion is configured to display the detected speed limit (Vst_new) on the indicator when the predetermined condition is satisfied; and the processing portion is configured to not display the detected speed limit (Vst_new) on the indicator when the predetermined condition is not satisfied, wherein when the detected speed limit (Vst_new) is high, the predetermined distance (ΔDth) is set to a large value, and when the detected speed limit (Vst_new) is low, the predetermined distance (ΔDth) is set to a small value.