The present invention relates to a height adjustment manhole to be able to quickly and easily adjust the height of the upper part of the manhole according to the installation position, and to maintain the adjusted variable state firmly.;In order to achieve the above object, the present invention maintains the shape of the manhole 10 and is formed with an inclined surface 21 inclined upwardly on both upper sides thereof, and guide holes 21a and 21b on both sides of the inclined surface 21. A manhole lower portion 20 formed therethrough; A locking jaw 32 is formed at an upper portion so that the manhole cover 11 is settled, and guides 31a and 31b are formed to protrude from the inclined surface of the manhole lower frame 20 at both inner sides thereof. A manhole upper frame 30 sliding in a control groove 34 formed at a lower portion of the upper and lower portions of the control guide 33 formed at an upper end thereof so as to adjust the lifted height; Adjusting device 40 is installed between the both side walls of the manhole upper booth 30 to adjust the height of the manhole 10 while the manhole upper booth 30 is raised and lowered in the manhole booth 20; Characterized in that made.;Manhole, Height Adjustment, Manhole Upper Bootle, Manhole Lower Bootle
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