A protective cap, comprising: a cap body for protecting a head of a wearer and having a visor portion; a shield member, attached to the cap body, for covering a face of the wearer; and a guide means for guiding the shield member for movement between a housing position where the shield member is housed in the cap body and a shielding position where the shield member covers a face of the wearer, wherein an opening portion of the cap body is substantially horizontal and positioned at a slightly upper side than the wearer's ears when a standing upright wearer wears the protective cap, and characterised in that the shield member comprises, a main body portion for covering a face of the wearer, the main body being formed of a transparent body or a translucent body in a curved plate-like shape; and a visor portion being formed integrally with a lowermost end portion of the main body portion and the visor portion of the shield member is bent below the main body portion to project in a direction opposite to the main body portion, wherein when the shield member is positioned at the shielding position, the lowermost end portion of the shield is positioned below a chin of a wearer so that the shield member covers almost all of a face of the wearer, and when a flying object flying from a direction obliquely forward collides with the lower part of the shield member in a shallow angle, the flying object colliding and bouncing back is made to re-collide with the visor portion, and then falls down to any sites apart from the wearer, so that a situation that the flying object reaches the body of the wearer is avoided, and when the shield member is positioned at the housing position, the shield member does not interfere with a wearer so that the wearer can wear the protective cap without being aware of existence of the shield member in his or her visual afield, and wherein the guide means comprises a guide portion provided at a guide member, and an engagement portion provided at the shield plate to engage with the guide portion, and the guide member is integrally provided in the interior of the cap body. a cap body for protecting a head of a wearer and having a visor portion; a shield member, attached to the cap body, for covering a face of the wearer; and a guide means for guiding the shield member for movement between a housing position where the shield member is housed in the cap body and a shielding position where the shield member covers a face of the wearer, wherein an opening portion of the cap body is substantially horizontal and positioned at a slightly upper side than the wearer's ears when a standing upright wearer wears the protective cap, and characterised in that the shield member comprises, a main body portion for covering a face of the wearer, the main body being formed of a transparent body or a translucent body in a curved plate-like shape; and a visor portion being formed integrally with a lowermost end portion of the main body portion and the visor portion of the shield member is bent below the main body portion to project in a direction opposite to the main body portion, wherein when the shield member is positioned at the shielding position, the lowermost end portion of the shield is positioned below a chin of a wearer so that the shield member covers almost all of a face of the wearer, and when a flying object flying from a direction obliquely forward collides with the lower part of the shield member in a shallow angle, the flying object colliding and bouncing back is made to re-collide with the visor portion, and then falls down to any sites apart from the wearer, so that a situation that the flying object reaches the body of the wearer is avoided, and when the shield member is positioned at the housing position, the shield member does not interfere with a wearer so that the wearer can wear the protective cap without being aware of existence of the shield member in his or her visual afield, and wherein the guide means comprises a guide portion provided at a guide member, and an engagement portion provided at the shield plate to engage with the guide portion, and the guide member is integrally provided in the interior of the cap body.