Roller (26) for a roller tappet (20) of a high-pressure fuel pump (14), which is constructed as a composite roller (28) and has: a first material (40) for forming a first composite roll portion (38), a second material (44) for forming a second composite roll portion (42), wherein the first material (40) and the second material (44) are interconnected to form a composite roll volume member (46), wherein the first material (40) is lighter than the second material (44), wherein the roller (26) is rotatably formed about an axis of rotation (52), the first composite roller portion (38) being formed as a first layer (48) extending radially away from the rotation axis (52), the second composite roller portion (Fig. 42) is formed as a second layer (50) extending in the radial direction away from the rotation axis (52), wherein the first layer (48) is arranged closer to the rotation axis (52) than the second layer (50), the composite roll volume member (46) having a third composite roll portion (70) formed as a third layer (68) extending radially away from the rotation axis (52) and connected to the first layer (48) closer to the first Rotary axis (52) is arranged as the first layer (48), and having a steel.
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