A harvester capable of automated traveling and manual traveling, comprising: an inner side map creating section configured to create, based on an outer shape of an outer circumference area, inner side map data indicative of a polygonal shape of an unworked area located inside the outer circumference area, the outer circumference area being created in an outer circumference of a field with a circumference reaping work traveling by the manual traveling; an initial reference line calculating section configured to calculate from the inner side map data an initial reference line (Ls) which lies parallel with one side of the unworked area and which connects two border points (P1, P2) between the outer circumference area and the unworked area; a subsequent reference line calculating section configured to calculate a subsequent reference line subsequent to the initial reference line (Ls) and a further subsequent reference line subsequent to the subsequent reference line; an automated traveling control section configured to execute the automated traveling based on a traveling route and a self-machine position, the traveling route being comprised of the initial reference line (Ls) and the subsequent reference lines (L2, L3); and a manual traveling control section configured to execute, based on a manual operation signal, a turning transition traveling for transition from automated traveling using one of the reference lines to automated traveling using one of the subsequent reference lines; the harvester being characterized by further comprising: an automated traveling management section configured to grasp one of the subsequent reference lines during the turning transition traveling; a notification section configured to notify a driver in response to grasping the one the subsequent reference lines by the automated traveling management section; and an automated traveling operation tool configured to output an automated traveling transition request through a manual operation, wherein if one of the subsequent reference lines is grasped and an azimuth divergence between the azimuth of the one of the subsequent reference lines used for the automated traveling and the azimuth of a machine body is equal to or less than a predetermined value, an automated traveling start command is given to the automated traveling control section in response to the automated traveling transition request outputted from the automated traveling operation tool. an inner side map creating section configured to create, based on an outer shape of an outer circumference area, inner side map data indicative of a polygonal shape of an unworked area located inside the outer circumference area, the outer circumference area being created in an outer circumference of a field with a circumference reaping work traveling by the manual traveling; an initial reference line calculating section configured to calculate from the inner side map data an initial reference line (Ls) which lies parallel with one side of the unworked area and which connects two border points (P1, P2) between the outer circumference area and the unworked area; a subsequent reference line calculating section configured to calculate a subsequent reference line subsequent to the initial reference line (Ls) and a further subsequent reference line subsequent to the subsequent reference line; an automated traveling control section configured to execute the automated traveling based on a traveling route and a self-machine position, the traveling route being comprised of the initial reference line (Ls) and the subsequent reference lines (L2, L3); and a manual traveling control section configured to execute, based on a manual operation signal, a turning transition traveling for transition from automated traveling using one of the reference lines to automated traveling using one of the subsequent reference lines; the harvester being characterized by further comprising: an automated traveling management section configured to grasp one of the subsequent reference lines during the turning transition traveling; a notification section configured to notify a driver in response to grasping the one the subsequent reference lines by the automated traveling management section; and a manual traveling control section configured to execute, based on a manual operation signal, a turning transition traveling for transition from automated traveling using one of the reference lines to automated traveling using one of the subsequent reference lines; the harvester being characterized by further comprising: an automated traveling management section configured to grasp one of the subsequent reference lines during the turning transition traveling; a notification section configured to notify a driver in response to grasping the one the subsequent reference lines by the automated traveling management section; and an automated traveling operation tool configured to output an automated traveling transition request through a manual operation, wherein if one of the subsequent reference lines is grasped and an azimuth divergence between the azimuth of the one of the subsequent reference lines used for the automated traveling and the azimuth of a machine body is equal to or less than a predetermined value, an automated traveling start command is given to the automated traveling control section in response to the automated traveling transition request outputted from the automated traveling operation tool.