Floor panel and method for laying a floor panel

Floor panel which is delimited in the horizontal plane by an upper side (15)， in particular provided with a decorative layer (16) or the like， and an underside (7) provided for resting on an underfloor， which is provided with means for releasably connecting at least two panels (1， 2 ) is provided， A spring (10) extending in the longitudinal direction of the side edge is formed on at least a first side edge of a first panel (1) and a recess (3) corresponding to the spring (10) is formed on the opposite second side edge， wherein the recess (3) consists of an upper lip (4) and a lower lip (6) and the lower lip (6) forms a shoulder (9) with a shoulder top (5) and a shoulder front (8)， which has a corresponding undercut ( 13) of the spring (10) blocks the panels (1， 2) in the transverse direction (Q)， with a recess on the undercut (13) with a support area (14) corresponding to the top of the heel (5) and a wall (11) connects which lies opposite the heel front (8) in the installed state， corresponding form-locking elements (30， 31) being formed on the wall (11) and the heel front (8)， which engage in one another in the installed state and bring about a locking in the vertical direction (V)， whereby an underside (100) of the spring (10) and an upper side (60) of the lower lip (6) run parallel to the upper side (15)， wherein on a third， at an angle to the first side edge， form-locking elements (23， 24) for locking in the vertical direction (V) are formed with a further panel， the form-locking elements (23， 24) on two spaced apart， substantially vertically oriented Walls (21， 22) in the transverse direction (Q) and in the vertical direction (V) are spaced apart from one another， wherein on the third side edge， a step-shaped cutout (20) starting from the underside (7) is formed with an inner wall (21) and an outer wall (22)， one on the walls (21， 22) in each case Form-fitting elements (23， 24) extending in the transverse direction (Q)， and on the fourth side edge opposite the third side edge， a starting from the top side (15)， step-shaped milling (200) with an inner wall (210) and an outer wall (220) is formed， on which undercuts (230， 240) corresponding to the form-locking elements (23， 24) are formed， characterized in that the step-shaped milling (200) starting from the upper side (15) forms a shoulder (250) protruding in the direction of the upper side (15)， which has a substantially horizontally oriented head surface (260)， the lower area of ????the Heel outer wall (220) an undercut (230) is formed， which corresponds to the form-fitting element (23) of the inner wall (21) of the cutout (20) of the opposite side edge and that the upwardly protruding shoulder (250) is not formed or removed in at least one end region of the fourth side edge， wherein the spring (10) is designed such that a locking by inserting into the recess (3) of the second floor panel (2) and pivoting about an axis parallel to the first side edge， whereby at the same time a positive connection between the third side edge of the first floor panel (1) and a fourth side edge of a third floor panel can be formed.