This photovoltaic module (10) comprises: a transparent upper electrically insulating sheet (16) and a lower electrically insulating sheet (18) that are sealed together so as to define a hermetic housing; photovoltaic cells (12, 14) compressed between the upper and lower sheets (16, 18); at least two electrical contacts placed on at least one side of each cell (12, 14), at least one electrical contact taking the form of a strip; and elements (52-56) electrically connecting the contacts of each cell with the contacts of at least one adjacent cell. At least one strip (32) of each cell (12, 14) is lodged in a recess provided in the sheet (16, 18) facing said strip, the recess being defined by: a depth of between a quarter and three quarters of the thickness of the strip (32) in an uncompressed state; a width greater than or equal to the width of the strip (32) at 85oC; and a length greater than or equal to the length of the strip (32) at 85oC.