A braking band of a disc for disc brake of ventilated type, wherein - said braking band comprises two plates (3, 4); - said two plates (3, 4) are coaxial with a same rotation axis (A-A); - said two plates (3, 4) comprise two inner side surfaces (5, 6) which are arranged facing each other; - said two inner side surfaces (5, 6) are mutually spaced apart forming a ventilation duct for permitting a cooling air flow between the two plates (3, 4); - said two plates (3, 4) are connected to each other by means of at least pin elements (8, 9, 10, 11, 12) which project from an inner side surface of a first plate to reach the facing inner side surface of the facing plate; - said pin elements (8, 9, 10, 11, 12) are a plurality of pin elements (8, 9, 10, 11, 12) distributed circumferentially in uniform manner to form circular rings, or ranks, forming a rank of inner pin elements arranged closer to the rotation axis (A-A), a rank of outer pin elements arranged further from the rotation axis (A-A), and ranks of intermediate pin elements (9, 10, 11); - the pin elements (8, 9, 10, 11, 12) of ranks arranged close to each other are circumferentially staggered so that, following a radial direction (R-R) with respect to the rotation axis (A-A), each pin element of any rank is located between two pin elements of the adjacent rank; - the pin elements (8, 9, 10, 11, 12) have a cross section in a median plane parallel to the fluid flow in the ventilation duct; wherein - the pin elements (9, 10, 11) of the intermediate ranks comprise: - at least one rank of pin elements of the intermediate ranks with pin elements having a substantially circular cross section, forming a circumference-shaped cross section edge; - at least one further rank of pin elements of the intermediate ranks with pin elements having a substantially circular cross section, forming a circumference-shaped cross section edge; and wherein - all pin elements (9, 10, 11) of each intermediate rank are mutually equal in the same rank, characterized in that the braking band further comprises at least one further rank of pin elements of the intermediate ranks with pin elements having a substantially rhomboidal cross section, forming a rhombus-shaped cross section edge. - said braking band comprises two plates (3, 4); - said two plates (3, 4) are coaxial with a same rotation axis (A-A); - said two plates (3, 4) comprise two inner side surfaces (5, 6) which are arranged facing each other; - said two inner side surfaces (5, 6) are mutually spaced apart forming a ventilation duct for permitting a cooling air flow between the two plates (3, 4); - said two plates (3, 4) are connected to each other by means of at least pin elements (8, 9, 10, 11, 12) which project from an inner side surface of a first plate to reach the facing inner side surface of the facing plate; - said pin elements (8, 9, 10, 11, 12) are a plurality of pin elements (8, 9, 10, 11, 12) distributed circumferentially in uniform manner to form circular rings, or ranks, forming a rank of inner pin elements arranged closer to the rotation axis (A-A), a rank of outer pin elements arranged further from the rotation axis (A-A), and ranks of intermediate pin elements (9, 10, 11); - the pin elements (8, 9, 10, 11, 12) of ranks arranged close to each other are circumferentially staggered so that, following a radial direction (R-R) with respect to the rotation axis (A-A), each pin element of any rank is located between two pin elements of the adjacent rank; - the pin elements (8, 9, 10, 11, 12) have a cross section in a median plane parallel to the fluid flow in the ventilation duct; wherein - the pin elements (9, 10, 11) of the intermediate ranks comprise: - at least one rank of pin elements of the intermediate ranks with pin elements having a substantially circular cross section, forming a circumference-shaped cross section edge; - at least one further rank of pin elements of the intermediate ranks with pin elements having a substantially circular cross section, forming a circumference-shaped cross section edge; and wherein - all pin elements (9, 10, 11) of each intermediate rank are mutually equal in the same rank, characterized in that the braking band further comprises at least one further rank of pin elements of the intermediate ranks with pin elements having a substantially rhomboidal cross section, forming a rhombus-shaped cross section edge. - at least one rank of pin elements of the intermediate ranks with pin elements having a substantially circular cross section, forming a circumference-shaped cross section edge; - at least one further rank of pin elements of the intermediate ranks with pin elements having a substantially circular cross section, forming a circumference-shaped cross section edge; and wherein - all pin elements (9, 10, 11) of each intermediate rank are mutually equal in the same rank, characterized in that the braking band further comprises at least one further rank of pin elements of the intermediate ranks with pin elements having a substantially rhomboidal cross section, forming a rhombus-shaped cross section edge.