A high-pressure liquid jet cleaner suitable for use in cleaning a thin film solar cell panel having a plurality of scribe lines, comprising: a plurality of high-pressure liquid jet nozzles each configured to jet out a high-pressure liquid in a straight line to a corresponding one of said plurality of scribe lines to clean the scribe lines which continuously extend in a direction perpendicular to the width direction of the thin film solar cell panel and which are arranged in the width direction at consistent intervals; a nozzle holder holding the plurality of jet nozzles which are arranged in the longitudinal direction of the nozzle holder and which correspond to the respective scribe lines; a support (11 to 14) configured to support the nozzle holder; and a conveyor configured to convey the solar cell panel in relation to the nozzle holder in a direction that is perpendicular to the longitudinal direction of the nozzle holder and that is parallel to the direction in which the scribe lines of the solar cell panel extend continuously; and a scribe line position sensor disposed at one end in the longitudinal direction of the nozzle holder 2 directly above one of the scribe lines, wherein the support supports the nozzle holder in a manner to allow the nozzle holder to move in the longitudinal direction of the nozzle holder, and the support includes a micro-positioning device configured to move the nozzle holder in the longitudinal direction by a micro distance for positioning the jet nozzles, and the scribe line position sensor is configured to detect a position of the one of the scribe lines in advance, and based on the detected position, the micro-positioning device is configured to perform the positioning of the jet nozzles such that the high-pressure liquid jetted out from the jet nozzles hits the respective scribe lines. a plurality of high-pressure liquid jet nozzles each configured to jet out a high-pressure liquid in a straight line to a corresponding one of said plurality of scribe lines to clean the scribe lines which continuously extend in a direction perpendicular to the width direction of the thin film solar cell panel and which are arranged in the width direction at consistent intervals; a nozzle holder holding the plurality of jet nozzles which are arranged in the longitudinal direction of the nozzle holder and which correspond to the respective scribe lines; a support (11 to 14) configured to support the nozzle holder; and a conveyor configured to convey the solar cell panel in relation to the nozzle holder in a direction that is perpendicular to the longitudinal direction of the nozzle holder and that is parallel to the direction in which the scribe lines of the solar cell panel extend continuously; and a scribe line position sensor disposed at one end in the longitudinal direction of the nozzle holder 2 directly above one of the scribe lines, wherein the support supports the nozzle holder in a manner to allow the nozzle holder to move in the longitudinal direction of the nozzle holder, and the support includes a micro-positioning device configured to move the nozzle holder in the longitudinal direction by a micro distance for positioning the jet nozzles, and the scribe line position sensor is configured to detect a position of the one of the scribe lines in advance, and based on the detected position, the micro-positioning device is configured to perform the positioning of the jet nozzles such that the high-pressure liquid jetted out from the jet nozzles hits the respective scribe lines.