PROBLEM TO BE SOLVED: To provide a biological information monitor allowing a medical worker to easily perform comprehensive observation and also to easily make determination of a symptom.SOLUTION: A biological information monitor displays a plurality of trend graphs side by side in a direction orthogonal to the time axis, and also displays a linear pointer A1 extending through the plurality of trend graphs such that the linear pointer A1 penetrates the points at the same time in the plurality of trend graphs while reading from a storage unit the measured values corresponding to the points of intersection of the linear pointer A1 and the plurality of trend graphs to display the read measured values on the screen on which the plurality of trend graphs are displayed.