1. A magnetic resonance imaging apparatus for performing multistation imaging, characterized by comprising: an imaging managing unit that manages imaging executed at each station of the multistation imaging; an input unit that accepts an input of an imaging parameter value to be used for the imaging concerned for every imaging managed by the imaging managing unit; an imaging “possible or impossible” determining unit that in a case that a new imaging parameter value is input through the input unit, determines with respect to each imaging job or task associated with the new imaging parameter value, whether the new imaging parameter value is proper or improper; and an error display unit that displays as an error information (i) identification of an imaging job or task having an imaging parameter value determined to be improper by the imaging “possible or impossible” determining unit and (ii) the imaging parameter value determined to be improper and associated with the identified imaging job or task; and a combination “possible or impossible” determining unit that determines whether it is possible or impossible to combine images among stations by using the newly input imaging parameter when there is no imaging parameter value which is determined to be improper by the imaging “possible or impossible” determining unit, wherein when it is determined in the combination “possible or impossible” determining unit that the combination is impossible, the error display unit displays information meaning impossibility of the combination together with information that can specify both adjacent stations to which the combination impossibility is determined, wherein the combination “possible or impossible” determining unit comprises: a common value determining unit that determines whether an imaging parameter which should have the same value among predetermined imaging operations have the same value among the imaging operations concerned; a slice matching determining unit that determines slice matching with respect to imaging in which slices are required to be matched with one another among stations; and an overlap determining unit that determines whether an overlap amount between adjacent stations is within a predetermined range with respect to an imaging group in which reconstructed images are combined with one another, wherein when there is an imaging parameter having a different value in imaging parameters determined in the common value determining unit, the error display unit displays the imaging parameter concerned and information that can specify an imaging operation in which the imaging parameter should be identical, when slices are mismatched in the slice matching determining unit, the error display unit displays information that can specify imaging in which mismatching occurs, and when an overlap amount is out of the predetermined range in the overlap unit, the error display unit displays information that can specify both adjacent stations whose overlap amount is out of the range.