Panel, in particular a floor panel or wall panel, comprising: - a centrally located core provided with an upper side and a lower side, which core defines a plane; - wherein the core has a thickness, which thickness is the distance between the upper side and the lower side of the core; - at least one first coupling part and at least one second coupling part connected respectively to opposite edges (5, 6) of the core, o which first coupling part comprises an upward tongue, at least one upward flank lying at a distance from the upward tongue and an upward groove formed in between the upward tongue and the upward flank wherein the upward groove is adapted to receive at least a part of a downward tongue of a second coupling part of an adjacent panel: o which second coupling part comprises a downward tongue, at least one downward flank lying at a distance from the downward tongue, and a downward groove formed in between the downward tongue and the downward flank, wherein the downward groove is adapted to receive at least a part of an upward tongue of a first coupling part of an adjacent panel; - wherein at least a part of a side of the upward tongue facing away from the upward flank is provided with a first locking element, in the form of an outward bulge, adapted for co-action with a second locking element, in the form of a recess, of an adjacent panel; - wherein at least a part of a side of the downward flank is provided with a second locking element, in the form of a recess (15, adapted for co-action with the first locking element of an adjacent panel; - wherein the lower part of the first coupling part that is located between a side of the upward tongue facing away from the upward flank and the upward flank is the bottom part of the first coupling part, and - wherein the bottom part of the first coupling part comprises a recessed portion, in particular a recessed portion extending between the upward flank and the side of the upward tongue facing away from the upward flank; - wherein the recessed portion is configured to allow downward movement of the upward tongue, into the recessed portion, during coupling of two adjacent panels, preferably such that the upward groove is temporarily widened to facilitate coupling of two panels; - wherein at least a part of the side of the upward tongue facing away from the upward flank is located at a distance from at least a part of the upward flank; - wherein at least a part of the side of the upward tongue is inclined towards the upward flank, wherein the angle (α) enclosed between the plane of the panel and the inclined part of the side of the upward tongue facing the upward flank lies between 90 and 45 degrees; - wherein the distance is less than the thickness of the core; and - wherein the recessed portion extends over at least 75% of the distance, and preferably extends over the complete distance. - a centrally located core provided with an upper side and a lower side, which core defines a plane; - wherein the core has a thickness, which thickness is the distance between the upper side and the lower side of the core; - at least one first coupling part and at least one second coupling part connected respectively to opposite edges (5, 6) of the core, o which first coupling part comprises an upward tongue, at least one upward flank lying at a distance from the upward tongue and an upward groove formed in between the upward tongue and the upward flank wherein the upward groove is adapted to receive at least a part of a downward tongue of a second coupling part of an adjacent panel: o which second coupling part comprises a downward tongue, at least one downward flank lying at a distance from the downward tongue, and a downward groove formed in between the downward tongue and the downward flank, wherein the downward groove is adapted to receive at least a part of an upward tongue of a first coupling part of an adjacent panel; - wherein at least a part of a side of the upward tongue facing away from the upward flank is provided with a first locking element, in the form of an outward bulge, adapted for co-action with a second locking element, in the form of a recess, of an adjacent panel; - wherein at least a part of a side of the downward flank is provided with a second locking element, in the form of a recess (15, adapted for co-action with the first locking element of an adjacent panel; - wherein the lower part of the first coupling part that is located between a side of the upward tongue facing away from the upward flank and the upward flank is the bottom part of the first coupling part, and - wherein the bottom part of the first coupling part comprises a recessed portion, in particular a recessed portion extending between the upward flank and the side of the upward tongue facing away from the upward flank; - wherein the recessed portion is configured to allow downward movement of the upward tongue, into the recessed portion, during coupling of two adjacent panels, preferably such that the upward groove is temporarily widened to facilitate coupling of two panels; - wherein at least a part of the side of the upward tongue facing away from the upward flank is located at a distance from at least a part of the upward flank; - wherein at least a part of the side of the upward tongue is inclined towards the upward flank, wherein the angle (α) enclosed between the plane of the panel and the inclined part of the side of the upward tongue facing the upward flank lies between 90 and 45 degrees; - wherein the distance is less than the thickness of the core; and - wherein the recessed portion extends over at least 75% of the distance, and preferably extends over the complete distance.