A vertical machining center comprising: a machining table on which one pallet is to be placed; a spindle head comprising a spindle on which a tool is to be mounted, the machining table and the spindle head being configured to move relative to one another in an X axis direction, which is a right-left machine direction, in a Y axis direction, which is a front-rear machine direction, and in a Z axis direction, which is an upward-downward machine direction; and a splash guard (14A, 14B) covering a machining area of the vertical machining center, wherein the spindle head is configured to move in the Z axis direction, wherein the vertical machining center comprises: a rotary pallet exchanger configured to exchange the one pallet placed on the machining table with another pallet placed in a setup area of the pallet exchanger; and a pallet rotational movement area in which the pallets are to be rotated, wherein the vertical machining center comprises an oil pan below the other pallet placed in the setup area of the pallet exchanger, the oil pan accommodating at least a part of the pallet rotational movement area located outside the splash guard (14A, 14B) on a machine front, wherein the vertical machining center comprises: a partition door configured to open and close to partition the machining area and the setup area from one another; and an openable-closable cover configured to open and close the setup area, wherein the oil pan comprises a cutout portion on one end of the oil pan, and an area of space exposed to the cutout portion serves as a cutout area, wherein, when the openable-closable cover is open, the cutout area serves as a part of an operator area to which an operator is accessible, and when the openable-closable cover is closed, the cutout area serves as a part of a pallet rotation area of the pallet exchanger, characterized in that the machining table is configured to move in the X axis direction, the pallet exchanger comprises a rotational center that is offset in the X axis direction from an axial center of the spindle of the spindle head, and the cutout portion is disposed at the one end of the oil pan, the one end of the oil pan being closer to a line that is parallel to a Y axis passing through the axial center of the spindle than another end of the oil pan is to the line. a machining table on which one pallet is to be placed; a spindle head comprising a spindle on which a tool is to be mounted, the machining table and the spindle head being configured to move relative to one another in an X axis direction, which is a right-left machine direction, in a Y axis direction, which is a front-rear machine direction, and in a Z axis direction, which is an upward-downward machine direction; and a splash guard (14A, 14B) covering a machining area of the vertical machining center, wherein the spindle head is configured to move in the Z axis direction, wherein the vertical machining center comprises: a rotary pallet exchanger configured to exchange the one pallet placed on the machining table with another pallet placed in a setup area of the pallet exchanger; and a pallet rotational movement area in which the pallets are to be rotated, wherein the vertical machining center comprises an oil pan below the other pallet placed in the setup area of the pallet exchanger, the oil pan accommodating at least a part of the pallet rotational movement area located outside the splash guard (14A, 14B) on a machine front, wherein the vertical machining center comprises: a partition door configured to open and close to partition the machining area and the setup area from one another; and an openable-closable cover configured to open and close the setup area, wherein the oil pan comprises a cutout portion on one end of the oil pan, and an area of space exposed to the cutout portion serves as a cutout area, wherein, when the openable-closable cover is open, the cutout area serves as a part of an operator area to which an operator is accessible, and when the openable-closable cover is closed, the cutout area serves as a part of a pallet rotation area of the pallet exchanger, characterized in that the machining table is configured to move in the X axis direction, the pallet exchanger comprises a rotational center that is offset in the X axis direction from an axial center of the spindle of the spindle head, and the cutout portion is disposed at the one end of the oil pan, the one end of the oil pan being closer to a line that is parallel to a Y axis passing through the axial center of the spindle than another end of the oil pan is to the line.