A capsule for infusing a beverage, comprising: - a cup structure including an opening closed by means of a cover; - a filter resting on a bottom of the cup structure under a perimeter step of the cup structure; wherein said bottom includes an outlet hole of the beverage; - a laminar membrane separating a lower chamber from an upper chamber of the cup structure; wherein the filter is in the lower chamber, and wherein the upper chamber is configured to house a food substance; wherein the laminar membrane is attached to the cup structure by means of a first sealed attachment coinciding with an annular area of the laminar membrane welded to the perimeter step of the cup structure; and wherein the filter comprises an upper maze and a lower maze arranged in opposition and communicating with each other through holes close to the exterior contour of the filter; wherein the upper maze is in contact with the laminar membrane and the lower maze is in contact with the bottom of the cup structure; characterised in that: - the laminar membrane is attached to the filter by means of a second central sealed attachment coinciding with a first internal part of the laminar membrane which is welded to an area of a central plateau that forms part of the filter; whereinthe laminar membrane includes a continuous circumferential pre-cut which has a diameter greater than the dimension of the contour of the central plateau of the filter; - the continuous circumferential pre-cut is located in an annular portion of the laminar membrane facing an annular valley located in the upper maze of the filter and forming a closed path to generate a continuous annular opening around the central plateau; wherein the annular valley has a span and said annular portion is located in the span of the annular valley; and wherein said annular portion rests on two parallel collateral areas on supports which delimit the opening of the annular valley; wherein once the laminar membrane breaks along the continuous circumferential pre-cut thereof, the beverage flows expanding in the upper maze from the annular valley to the holes and concentrating in the lower maze towards the outlet hole. - a cup structure including an opening closed by means of a cover; - a filter resting on a bottom of the cup structure under a perimeter step of the cup structure; wherein said bottom includes an outlet hole of the beverage; - a laminar membrane separating a lower chamber from an upper chamber of the cup structure; wherein the filter is in the lower chamber, and wherein the upper chamber is configured to house a food substance; wherein the laminar membrane is attached to the cup structure by means of a first sealed attachment coinciding with an annular area of the laminar membrane welded to the perimeter step of the cup structure; and wherein the filter comprises an upper maze and a lower maze arranged in opposition and communicating with each other through holes close to the exterior contour of the filter; wherein the upper maze is in contact with the laminar membrane and the lower maze is in contact with the bottom of the cup structure; characterised in that: - the laminar membrane is attached to the filter by means of a second central sealed attachment coinciding with a first internal part of the laminar membrane which is welded to an area of a central plateau that forms part of the filter; whereinthe laminar membrane includes a continuous circumferential pre-cut which has a diameter greater than the dimension of the contour of the central plateau of the filter; - the continuous circumferential pre-cut is located in an annular portion of the laminar membrane facing an annular valley located in the upper maze of the filter and forming a closed path to generate a continuous annular opening around the central plateau; wherein the annular valley has a span and said annular portion is located in the span of the annular valley; and wherein said annular portion rests on two parallel collateral areas on supports which delimit the opening of the annular valley; - the laminar membrane is attached to the filter by means of a second central sealed attachment coinciding with a first internal part of the laminar membrane which is welded to an area of a central plateau that forms part of the filter; whereinthe laminar membrane includes a continuous circumferential pre-cut which has a diameter greater than the dimension of the contour of the central plateau of the filter; - the continuous circumferential pre-cut is located in an annular portion of the laminar membrane facing an annular valley located in the upper maze of the filter and forming a closed path to generate a continuous annular opening around the central plateau; wherein the annular valley has a span and said annular portion is located in the span of the annular valley; and wherein said annular portion rests on two parallel collateral areas on supports which delimit the opening of the annular valley; wherein once the laminar membrane breaks along the continuous circumferential pre-cut thereof, the beverage flows expanding in the upper maze from the annular valley to the holes and concentrating in the lower maze towards the outlet hole.