A material conveying bucket (4; 4'; 4"; 4"'; 400) for conveying raw material to be melted in a melting furnace to a preheater in a state where the material conveying bucket (4; 4'; 4"; 4"'; 400) is hung by a crane, the preheater being configured to preheat the raw material, by heat generated in the melting furnace, before the raw material is melted in the melting furnace, the material conveying bucket (4; 4'; 4"; 4"'; 400) comprising: a container portion including: a container for containing the raw material, the container having an upper opening and a bottom opening; a top cover configured to open and close the upper opening; and a bottom lid configured to open and close the bottom opening; and a handle portion to be hung by the crane; characterized by: a link mechanism that is connected to the top cover and the bottom lid and that connects the handle portion to the container portion so that the handle portion can move relative to the container portion, the link mechanism having a function of opening and closing the top cover when a first relative movement of the handle portion relative to the container portion is caused and a function of opening and closing the bottom lid when a second relative movement of the handle portion relative to the container portion is caused, the second relative movement being different in direction from the first relative movement, wherein: the container portion includes a bucket-side engagement portion (64, 65) provided at a position such that opening and closing of the bottom lid is not hindered, the bucket-side engagement portion (64, 65) having a strength enough to withstand a load exerted by the material conveying bucket (4; 4'; 4"; 4"'; 400) filled with the raw material; the material conveying bucket (4; 4'; 4"; 4"'; 400) is configured so that the bottom lid is opened and the raw material in the material conveying bucket (4; 4'; 4"; 4"'; 400) is thus discharged by causing the second relative movement of the handle portion relative to the container portion by lowering the crane while the material conveying bucket (4; 4'; 4"; 4"'; 400) is placed on the preheater in a state where the bucket-side engagement portion (64, 65) is engaged with the preheater; and the bucket-side engagement portion (64, 65) includes a flange portion provided all around the container portion. a container portion including: a container for containing the raw material, the container having an upper opening and a bottom opening; a top cover configured to open and close the upper opening; and a bottom lid configured to open and close the bottom opening; and a handle portion to be hung by the crane; characterized by: a link mechanism that is connected to the top cover and the bottom lid and that connects the handle portion to the container portion so that the handle portion can move relative to the container portion, the link mechanism having a function of opening and closing the top cover when a first relative movement of the handle portion relative to the container portion is caused and a function of opening and closing the bottom lid when a second relative movement of the handle portion relative to the container portion is caused, the second relative movement being different in direction from the first relative movement, wherein: the container portion includes a bucket-side engagement portion (64, 65) provided at a position such that opening and closing of the bottom lid is not hindered, the bucket-side engagement portion (64, 65) having a strength enough to withstand a load exerted by the material conveying bucket (4; 4'; 4"; 4"'; 400) filled with the raw material; the material conveying bucket (4; 4'; 4"; 4"'; 400) is configured so that the bottom lid is opened and the raw material in the material conveying bucket (4; 4'; 4"; 4"'; 400) is thus discharged by causing the second relative movement of the handle portion relative to the container portion by lowering the crane while the material conveying bucket (4; 4'; 4"; 4"'; 400) is placed on the preheater in a state where the bucket-side engagement portion (64, 65) is engaged with the preheater; and the bucket-side engagement portion (64, 65) includes a flange portion provided all around the container portion. the container portion includes a bucket-side engagement portion (64, 65) provided at a position such that opening and closing of the bottom lid is not hindered, the bucket-side engagement portion (64, 65) having a strength enough to withstand a load exerted by the material conveying bucket (4; 4'; 4"; 4"'; 400) filled with the raw material; the material conveying bucket (4; 4'; 4"; 4"'; 400) is configured so that the bottom lid is opened and the raw material in the material conveying bucket (4; 4'; 4"; 4"'; 400) is thus discharged by causing the second relative movement of the handle portion relative to the container portion by lowering the crane while the material conveying bucket (4; 4'; 4"; 4"'; 400) is placed on the preheater in a state where the bucket-side engagement portion (64, 65) is engaged with the preheater; and the bucket-side engagement portion (64, 65) includes a flange portion provided all around the container portion.