A measurement device comprising a body, a touch panel type display, a display control part and a probe, wherein the probe is configured to measure at least either one of a pH, an oxidation-reduction potential, an ionic concentration and electric conductivity by making contact with an object to be measured, the display control part is configured to display a measurement result obtained by the probe on the display, the display control part is configured to display at least two displaying screens in a switchable manner among a numerical value displaying screen that displays the measurement result as a numerical value, an analog displaying screen that displays a series of a scale on a predetermined position of which a value is assigned and an indication device that indicates a position corresponding to the measurement result on the scale, and a graph displaying screen that displays the measurement result as a time series graph on a coordinate system where one axis indicates a time and the other axis indicates the measurement result, the body is connected to the probe, and the display control part is configured to switch each of the displaying screens (W1, W2, W3) continuously in conjunction with a touch slide operation on the display by moving the displaying screen displayed prior to the touch slide operation to the outside of a displaying area on the display and by moving the other displaying screen to the inside of the displaying area in accordance with the above-mentioned movement, wherein the display control part is configured to display, in the middle of switching displaying screens which switches in conjunction with a touch slide operation, the numerical value of the numerical value displaying screen and either one of the scale displayed of the analog displaying screen or the time series graph of the graph displaying screen in the displaying area in the same as the measurement result, wherein, each of the measurement result displayed in the middle of the switching displaying screens is the latest one. the probe is configured to measure at least either one of a pH, an oxidation-reduction potential, an ionic concentration and electric conductivity by making contact with an object to be measured, the display control part is configured to display a measurement result obtained by the probe on the display, the display control part is configured to display at least two displaying screens in a switchable manner among a numerical value displaying screen that displays the measurement result as a numerical value, an analog displaying screen that displays a series of a scale on a predetermined position of which a value is assigned and an indication device that indicates a position corresponding to the measurement result on the scale, and a graph displaying screen that displays the measurement result as a time series graph on a coordinate system where one axis indicates a time and the other axis indicates the measurement result, the body is connected to the probe, and the display control part is configured to switch each of the displaying screens (W1, W2, W3) continuously in conjunction with a touch slide operation on the display by moving the displaying screen displayed prior to the touch slide operation to the outside of a displaying area on the display and by moving the other displaying screen to the inside of the displaying area in accordance with the above-mentioned movement, wherein the display control part is configured to display, in the middle of switching displaying screens which switches in conjunction with a touch slide operation, the numerical value of the numerical value displaying screen and either one of the scale displayed of the analog displaying screen or the time series graph of the graph displaying screen in the displaying area in the same as the measurement result, wherein, each of the measurement result displayed in the middle of the switching displaying screens is the latest one.